ci-pipeline-and-gates

From the author

Enforces a lean GitHub Actions Flutter CI where every gate maps to one named release-blocking contract — pinned runner + subosito/flutter-action@v2 toolchain, dart format --set-exit-if-changed, flutter analyze --fatal-infos, build_runner and drift schema freshness (git diff --exit-code), flutter test --test-randomize-ordering-seed random, static import/banned-string greps that catch what runtime can't, coverage-as-report-never-a-gate with the upward-lie fixed, verify-never-bless goldens (no --update-goldens in CI), and an honest statement of what CI cannot prove (audio, real fonts, on-device behaviour). Use when editing .github/workflows/*.yml, adding or removing a job or step, wiring a codegen/schema/format/analyze/coverage gate, writing a grep-based policy test or gate script under test/policy or tool/, pinning action versions, or claiming CI proves something it can't.