Supertag CLI v2.2.0

Added

• Live Read Backend (F-097) - Search and node-read operations now route through Tana's Local API when available, with automatic SQLite fallback
  • TanaReadBackend interface with LocalApiReadBackend and SqliteReadBackend implementations
  • Backend resolver: prefers Local API when healthy, falls back to SQLite silently
  • --offline flag on all commands to force SQLite backend regardless of Local API availability
  • FTS search (supertag search) uses live data when Tana Desktop is running
  • Node show (supertag nodes show) reads live content from Tana Desktop
  • MCP tools (tana_search, tana_node) use live backend when available
  • Canonical types (ReadSearchResult, ReadNodeContent, ReadTagInfo) normalize both backends
  • Session-cached health check — one probe per session, cached like write resolver
  • Semantic search stays on SQLite (embeddings are local-only)

Improved

• Day page smart depth - nodes show and tana_node_read MCP tool auto-expand calendar/day page nodes to depth 1 so section children (Todos, Notes, etc.) are visible by default. Non-calendar nodes still default to depth 0. Explicit --depth flag overrides auto-detection. Closes #37.