Linter Configuration Updates:
Add version: 2 to .golangci.yml for golangci-lint v2 compatibility
Scope errcheck exclusions to test files only via path-based rules
Maintain production code error checking while allowing test flexibility
CI/CD Documentation:
Fix CodeQL action version comment in security-pr.yml (v3.28.10 → v4)
Create workflow modularization specification (docs/plans/workflow_modularization_spec.md)
Document GitHub environment protection setup for releases
Verification:
Validated linter runs successfully with properly scoped rules
Confirmed all three workflows (playwright, security-pr, supply-chain-pr) are properly modularized
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