[pr-review] Daily PR Code Quality Review — 34741017597 #60582

#60568 — Bump gh-aw-firewall to v0.28.16 and gh-aw-mcpg to v0.4.21 (author: Copilot)

• 30 files changed, all .yml (generated lock files), one .json, one changeset .md.
• No Go or JS source files touched — purely a dependency/version bump with regenerated workflow artifacts.
• No error-handling, doc-comment, test, or function-size concerns apply.

#60559 — Guard remaining linter autofixes from comment-overlap deletions (author: Copilot)

• Adds astutil.HasOverlappingComment(...) guards to 10 custom Go lint analyzers (appendbytestring, bytesbufferstring, bytescomparestring, ctxbackground, execcommandwithoutcontext, fprintlnsprintf, lenstringsplit, lenstringzero, sprintfint, stringreplaceminusone, stringsindexhasprefix, tolowerequalfold, writebytestring) so suggested fixes are skipped when they would delete a comment.
• Change is mechanical and consistent: each analyzer gets the same guard pattern plus a comment_overlap.go / .golden testdata pair exercising it.
• Diagnostics are still reported even when the fix is suppressed (SuggestedFixes set to nil/empty), preserving lint coverage — good practice.
• No missing err != nil handling, no oversized functions, exported analyzer functions retain existing doc comments; new testdata files are appropriately small and self-contained (not general test files needing assertions beyond golden-file comparison).

#56568 — Fall back to unsigned push instead of failing on a genuine rebase conflict in pushSignedCommits (author: Copilot)

• Adds a new PushSignedCommitsUnsignedFallbackFailed sentinel error class with clear doc comment explaining why it must propagate without retry.
• Previously-silent catch { /* ignore */ } blocks around git rebase --abort are replaced with explicit error handling that surfaces abort failures with combined root-cause + abort-failure messages — an improvement to error handling, not a regression.
• New unsigned-push fallback path runs the same file-protection/size (validateSynthesizedFileChanges) and merge-commit/file-mode preflight checks as the GraphQL path before falling back, avoiding a policy-bypass regression.
• Extensive new integration tests cover both success (fallback push) and failure (abort failure, allowGitPushFallback: false) cases with real assertions (expect(...).toThrow(...), expect(...).toHaveBeenCalledWith(...)), not just t.Log-style checks.
• No oversized single function bodies introduced beyond the existing pushSignedCommits structure; changes are incremental within existing branches.