[vadde]

Summary

• Implements requirement R-109: Filesystem Symlink Cycle Guard & Alias Navigation in Omni-Graph.
• Uses standard library std::fs::symlink_metadata to intercept symlinks before reading content.
• Resolves canonical target paths via std::fs::canonicalize and emits dedicated symlink nodes with LINKS_TO edges (category: 'FILESYSTEM'), completely eliminating duplicate AST function clones and symbol table pollution.
• Safely handles cyclic symlinks and broken symlinks without recursion loops or process hangs.
• Synchronized src/ingestion/mod.rs and src/watcher/pipeline.rs with transactional atomic swap (execute_atomic_swap).
• Added unit tests test_r109_symlink_cycle_guard_and_alias_navigation and test_r109_symlink_atomic_swap_sql_generation (all 113 unit tests pass, 0 clippy warnings).
• Maintains Quad-Parity across specs/catalog/, STATUS.md, DEVLOG.md, and CONTEXT.md.