v0.0.4

What's Changed

Added

• Background worker — BackgroundWorker with per-path debounced task scheduling, flush()/drain() lifecycle, and IndexingMode. Replaces EventBus.
• Version chain verification — verify_chain(), verify_versions(), verify_all_versions() for proactive integrity checking.
• Composable search pipeline — vector_search(), lexical_search(), hybrid_search() with SearchProvider protocol.
• Connection service — Filesystem-owned persistent edges. Graph is now a pure in-memory projection.
• Result type algebra — FileOperationResult and FileSearchResult with set operations (&, |, -, >>).
• Ref identity type — Thin frozen wrapper with lazy path decomposition.
• GroverContext + 8 facade mixins — GroverAsync decomposed for maintainability.
• Native async integrations — deepagents and LangChain accept Grover | GroverAsync.

Changed

• Package restructure — fs/ → backends/, facade/ → api/, types/ → results/, graph/ + search/ → providers/.
• Protocol consolidation — 5 capability protocols merged into GroverFileSystem. Graph 8→1, search 9→6, storage 3→1.
• Filesystem-centric providers — DatabaseFileSystem owns all providers. Mount stripped to minimal dataclass.
• LocalFileSystem simplified to thin DatabaseFileSystem subclass (~330 lines).
• Graph terminology — dependents/dependencies → predecessors/successors.
• Type safety — Any replaced with concrete types. ty check src/ passes clean.
• Backward compat aliases removed — mount() → add_mount(), dead code deleted.

Fixed

• Path traversal vulnerability in UserScopedFileSystem._resolve_path.
• Read-only permission enforcement across all mutation paths.

Full Changelog: v0.0.3...v0.0.4