Rebuild engine on dragontoothmg and add enterprise repo scaffold

.dockerignore

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+.git
+.github
+bin
+dist
+docs
+*.md
+!README.md
+!LICENSE
+*.out
+*.prof
+.golangci.yml

.editorconfig

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+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.go]
+indent_style = tab
+indent_size = 4
+
+[*.{yml,yaml,json,md,toml}]
+indent_style = space
+indent_size = 2
+
+[Makefile]
+indent_style = tab

.gitattributes

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+# Normalize line endings
+* text=auto eol=lf
+
+*.go   text diff=golang
+*.md   text
+*.yml  text
+*.yaml text
+
+# Binary
+*.png  binary
+*.bin  binary
+
+# Keep vendored/generated files out of language stats and diffs
+go.sum          linguist-generated=true
+/vendor/**      linguist-vendored=true

.github/CODEOWNERS

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+# Default owner for everything in the repo.
+*                       @cjunius
+
+# Engine internals — require review from the engine owner.
+/internal/engine/       @cjunius
+/internal/uci/          @cjunius
+
+# Build, CI, and release configuration.
+/.github/               @cjunius
+/Makefile               @cjunius
+/Dockerfile             @cjunius
+/.goreleaser.yaml       @cjunius

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: Bug report
+description: A crash, an illegal move, a wrong result, or other incorrect behavior
+labels: ["bug", "triage"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        For security issues, do **not** file here — see SECURITY.md.
+  - type: textarea
+    id: what-happened
+    attributes:
+      label: What happened?
+      description: What did you expect, and what happened instead?
+    validations:
+      required: true
+  - type: input
+    id: fen
+    attributes:
+      label: Position (FEN)
+      placeholder: "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"
+  - type: textarea
+    id: repro
+    attributes:
+      label: Steps to reproduce
+      description: The exact UCI commands or CLI invocation.
+      placeholder: |
+        position fen <fen>
+        go movetime 1000
+      render: shell
+    validations:
+      required: true
+  - type: input
+    id: version
+    attributes:
+      label: Version
+      description: Output of `gochess version`
+    validations:
+      required: true
+  - type: dropdown
+    id: os
+    attributes:
+      label: OS
+      options:
+        - Linux
+        - macOS
+        - Windows
+        - Other
+    validations:
+      required: true
+  - type: textarea
+    id: logs
+    attributes:
+      label: Relevant output / logs
+      render: shell

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: Question or discussion
+    url: https://github.com/cjunius/goChess/discussions
+    about: Ask how to use the engine, GUI setup, or general chess-programming questions.
+  - name: Security vulnerability
+    url: https://github.com/cjunius/goChess/security/advisories/new
+    about: Report a vulnerability privately (see SECURITY.md).

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: Feature request
+description: Suggest a new feature or improvement
+labels: ["enhancement", "triage"]
+body:
+  - type: textarea
+    id: problem
+    attributes:
+      label: Problem
+      description: What are you trying to do that is hard or impossible today?
+    validations:
+      required: true
+  - type: textarea
+    id: proposal
+    attributes:
+      label: Proposed solution
+    validations:
+      required: true
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Alternatives considered
+  - type: checkboxes
+    id: contribute
+    attributes:
+      label: Contribution
+      options:
+        - label: I am willing to open a PR for this

.github/PULL_REQUEST_TEMPLATE.md

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+<!-- Thanks for contributing! Keep PRs focused on one logical change. -->
+
+## What & why
+
+<!-- What does this change and why? Link the issue it closes. -->
+
+Closes #
+
+## Type of change
+
+- [ ] Bug fix
+- [ ] New feature
+- [ ] Chess strength change (search/eval)
+- [ ] Refactor / internal
+- [ ] Docs / CI / build
+
+## Checklist
+
+- [ ] `make check` passes locally (tidy + lint + vuln + test)
+- [ ] Tests added or updated
+- [ ] Move-generation changes include a passing perft test
+- [ ] `CHANGELOG.md` updated under `## [Unreleased]`
+- [ ] Commit messages follow Conventional Commits
+
+## Strength impact (search/eval changes only)
+
+<!--
+Provide match results vs. the previous version, e.g.:
+  cutechess-cli, 2000 games, 10+0.1s, book UHO_XXL:
+  Elo +14.2 +/- 8.1, LOS 99.9%
+-->
+
+N/A

.github/dependabot.yml

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+version: 2
+updates:
+  - package-ecosystem: gomod
+    directory: "/"
+    schedule:
+      interval: weekly
+    open-pull-requests-limit: 10
+    groups:
+      go-dependencies:
+        patterns:
+          - "*"
+    commit-message:
+      prefix: "chore(deps)"
+
+  - package-ecosystem: github-actions
+    directory: "/"
+    schedule:
+      interval: weekly
+    groups:
+      github-actions:
+        patterns:
+          - "*"
+    commit-message:
+      prefix: "chore(ci)"
+
+  - package-ecosystem: docker
+    directory: "/"
+    schedule:
+      interval: weekly
+    commit-message:
+      prefix: "chore(docker)"

.github/workflows/ci.yml

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+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+  merge_group:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ci-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        go: ["1.22.x", "1.23.x"]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: ${{ matrix.go }}
+          check-latest: true
+      - name: Verify modules are tidy
+        if: matrix.os == 'ubuntu-latest' && matrix.go == '1.23.x'
+        run: |
+          go mod tidy
+          git diff --exit-code -- go.mod go.sum
+      - name: Build
+        run: go build -v ./...
+      - name: Vet
+        run: go vet ./...
+      - name: Test (race, short)
+        run: go test -race -short -covermode atomic -coverprofile coverage.txt ./...
+      - name: Test (full, incl. deep perft)
+        if: matrix.os == 'ubuntu-latest'
+        run: go test -race ./...
+      - name: Upload coverage
+        if: matrix.os == 'ubuntu-latest' && matrix.go == '1.23.x'
+        uses: codecov/codecov-action@v4
+        with:
+          files: coverage.txt
+          fail_ci_if_error: false
+        env:
+          CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
+
+  vuln:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.23.x"
+      - name: govulncheck
+        run: |
+          go install golang.org/x/vuln/cmd/govulncheck@v1.1.4
+          govulncheck ./...

.github/workflows/codeql.yml

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+name: CodeQL
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  schedule:
+    - cron: "27 4 * * 1"
+
+permissions:
+  contents: read
+
+jobs:
+  analyze:
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.23.x"
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v3
+        with:
+          languages: go
+          queries: security-and-quality
+      - name: Autobuild
+        uses: github/codeql-action/autobuild@v3
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v3

.github/workflows/lint.yml

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+name: Lint
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+  merge_group:
+
+permissions:
+  contents: read
+
+jobs:
+  golangci:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.23.x"
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v6
+        with:
+          version: v1.61.0
+
+  gofumpt:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.23.x"
+      - name: Check formatting
+        run: |
+          go install mvdan.cc/gofumpt@latest
+          fmt_out="$(gofumpt -l .)"
+          if [ -n "$fmt_out" ]; then
+            echo "These files are not gofumpt-formatted:"
+            echo "$fmt_out"
+            exit 1
+          fi

.github/workflows/release.yml

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+name: Release
+
+on:
+  push:
+    tags: ["v*"]
+
+permissions:
+  contents: read
+
+jobs:
+  goreleaser:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write # create the GitHub Release
+      id-token: write # keyless signing / provenance
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-go@v5
+        with:
+          go-version: "1.23.x"
+      - name: Install Syft (SBOM generation)
+        uses: anchore/sbom-action/download-syft@v0
+      - name: Run GoReleaser
+        uses: goreleaser/goreleaser-action@v6
+        with:
+          version: "~> v2"
+          args: release --clean
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}