- Add tryRelinkOrphanedFeature() to find and link matching tasks
- Normalize titles (trim, lowercase, collapse whitespace) for matching
- Only relink when exactly one task matches (ambiguous = no action)
- Sync feature status from task state on successful relink
- Normalize to 'defined' when no safe relink exists
- Add 7 tests for orphaned feature relink scenarios
- All 57 tests passing