Stores cached structural knowledge about the workspace for code awareness features (e.g. architecture / mapping used by the TUI).

• Typically architecture_map.json — Derived map of the codebase layout (see mapping_store.py and tui/code_awareness/).

• Safe to delete to force a refresh; the next run may rebuild the cache.
• Contents are workspace-specific; add to .gitignore if you do not want to commit them.