Extract shared normalization/coercion helpers into private @openclaw/normalization-core workspace package while preserving existing plugin SDK helper subpaths.\n\nAlso keeps direct normalization-core imports internal, wires UI/build/loader resolution, and replaces the slow PR network CodeQL lane with a fast added-line boundary scan while retaining full CodeQL for scheduled/manual runs.\n\nVerification: local moved tests, plugin SDK boundary tests, extension loader tests, agents-support shard, UI build/test, build artifacts, lint, workflow guards, autoreview, and GitHub CI passed on PR head 963d893715.
Regeneration-Prompt: |
Investigate the unrelated failures in `src/infra/git-commit.test.ts` that started blocking other prep and gate flows. The real-checkout assertions were failing whenever the current branch ref lived only in `.git/packed-refs`, because `resolveCommitHash()` only followed loose ref files under `refs/heads/*` even though worktrees and packed refs are common in this repo. Keep the existing safety checks that reject traversal from crafted HEAD contents, but fall back to reading an exact ref match from `packed-refs` in the common git dir when the loose ref is missing. Add a deterministic regression test that simulates a worktree checkout with `commondir` and only a packed branch ref so the test no longer depends on the local repository state.
