merge: land PR #5 v0.2 enhancements

[EffortlessSteven]

Status

PR #5 (feat: v0.2 enhancements) has 18 commits and is ready for final merge prep.

Blockers

• xtask tests must pass (see feat: Comprehensive test coverage and documentation #1)
• All workspace tests green
• Review feedback addressed (see feat: v0.2 enhancements - SARIF, suppressions, presets, and more #3)

Merge Checklist

• Rebase on latest main
• CI fully green
• No merge conflicts
• Squash or merge commit (decide strategy)
• Post-merge: tag v0.2.0 if appropriate

[EffortlessSteven]

All blockers resolved:

• bug: config include recursion blocks valid DAG configurations #11 (config include DAG) → fixed in PR fix: config include DAG support and field-wise defaults merge (#11, #12) #14, merged
• bug: defaults merge replaces entire struct instead of field-wise #12 (defaults field-wise merge) → fixed in PR fix: config include DAG support and field-wise defaults merge (#11, #12) #14, merged
• fix: xtask conformance tests fail — binary path resolution broken #6 (xtask binary path) → fixed in PR fix(xtask): binary path resolution and mutex poison recovery (#6) #15, merged
• fix: LSP git diff subprocess has no timeout #13 (LSP git diff timeout) → fixed in PR fix: LSP git diff subprocess timeout (#13) #16, merged
• test: verify LSP integration tests pass #7 (LSP integration tests) → verified 49 tests passing
• review: triage AI reviewer feedback on PR #5 #8 (triage review feedback) → all addressed
• Main merged into feat branch, merge conflicts resolved
• Full workspace tests pass: 870+ ok, 0 failed
• CI checks passing
• PR feat: v0.2 enhancements — LSP, multi-base diffs, directory overrides, analytics #5 is ready to merge