refactor(ci): 批量精简脚本执行路径

[iamsyc]

What changed

• Reduced scripts/ci/classify.sh by consolidating repeated category and output handling.
• Removed single-use relay download, release architecture check, and WebRTC thin/sign scripts.
• Moved shared relay download and release binary thin/sign helpers into existing library modules.
• Simplified DMG creation by deleting its private intermediate summary path and keeping release build summary as the convergence layer.

Why

The scripts directory had accumulated redundant wrappers and duplicate failure-reporting layers. This keeps the same CI and release behavior while reducing script size and the number of moving parts.

Validation

• bash -n scripts/ci/*.sh scripts/dev/*.sh scripts/lib/*.sh scripts/release/*.sh scripts/build-relay.sh
• shfmt -d scripts/ci/*.sh scripts/dev/*.sh scripts/lib/*.sh scripts/release/*.sh scripts/build-relay.sh
• shellcheck -x -e SC2016 scripts/ci/*.sh scripts/dev/*.sh scripts/lib/*.sh scripts/release/*.sh scripts/build-relay.sh
• jq -e '.categories | type == "object"' scripts/ci/classification-rules.json
• ROOT_DIR=/Users/syc/Project/VoidDisplay TOOL_ROOT=/Users/syc/Project/VoidDisplay scripts/ci/test_classify.sh
• ROOT_DIR=/Users/syc/Project/VoidDisplay TOOL_ROOT=/Users/syc/Project/VoidDisplay scripts/ci/static.sh
• ROOT_DIR=/Users/syc/Project/VoidDisplay TOOL_ROOT=/Users/syc/Project/VoidDisplay scripts/ci/xcode.sh --action build --configuration Debug --out-dir .ai-tmp/scripts-reduction-xcode-build
• ROOT_DIR=/Users/syc/Project/VoidDisplay TOOL_ROOT=/Users/syc/Project/VoidDisplay scripts/release/build.sh --tag v2.1.0 --arch arm64 --label arm64 --out-dir .ai-tmp/scripts-reduction-release-build-arm64
• ROOT_DIR=/Users/syc/Project/VoidDisplay TOOL_ROOT=/Users/syc/Project/VoidDisplay scripts/release/verify.sh --assets-dir .ai-tmp/scripts-reduction-release-build-arm64/release-assets --tag v2.1.0 --label arm64 --arch arm64

[github-actions]

CI Summary

Run: Open

Check	Status	Details
Change Scope	code	code=true ui=false script=true product=false test=false ci=true release=true dependency=false tooling=false docs_only=false unknown=false
Required Gates	derived	static=true dependency=false unit=false xcode=false ui=false release=true
Dependency Review	skipped	required=false high and critical vulnerabilities block
Static Checks	success	required=true actionlint, shellcheck, shfmt, SwiftFormat, SwiftLint, action pinning
Unit Tests	skipped	required=false Swift tests: n/a Go packages: n/a Reason: n/a Artifact: n/a
Xcode Build	skipped	required=false Debug build with zero warning scan Artifact: xcode-build
UI Smoke	skipped	required=false Failure classification is written by ui-smoke-summary.json in each artifact. Artifacts: ui-smoke-baseline, ui-smoke-permissionDenied, ui-smoke-rebuildFailed
Release Smoke	success	required=true arm64=success intel64=skipped PR release smoke requires arm64 only. Artifacts: release-smoke-arm64 Release verify summaries are produced by release.yml before publishing.
Artifacts	link	Open artifacts
CI Gate	success	single branch protection check