fix(core): resolve .dockerignore validation bug in workspace discovery

[PunGrumpy]

This PR resolves Plan 001: Fix the .dockerignore validation bug in workspace discovery.

Summary

1. Workspace Discovery: Updated discoverProject to detect and track .dockerignore files under a new dockerignores property in the ProjectInfo return value.
2. Type Safety: Updated the ProjectInfo type definition in packages/core/src/types/index.ts to include the optional dockerignores field.
3. CLI Orchestration: Merged the discovered .dockerignore paths into the projectFilesList passed to the rule runner engine.
4. Complexity Reduction: Extracted the category filtering logic in the Commander CLI action handler into a clean, top-level filterDiagnostics helper function to keep complexity under 20.

All typechecks, builds, tests, and formatting checks pass cleanly.

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Project	Deployment	Actions	Updated (UTC)
docker-doctor	Ready	Preview, Comment	Jul 11, 2026 5:46pm