v0.12.0 - Budget Store, Doctor CLI, .env Discovery, Index Status

Added

• Persistent BudgetStore: New BudgetStore protocol enables pluggable budget state management backends.
  • Added SqliteBudgetStore for persistent budget tracking across process restarts.
  • Added atomic_reserve() for atomic check-and-record in a single transaction.
• Budget sipping: New budget adjustment feature that reconciles estimated vs actual audio duration after download.
  • Prevents budget waste by reserving based on estimated duration, then "sipping" (releasing) excess after actual duration is known.
• audiorag doctor CLI: New audiorag doctor subcommand for diagnosing pipeline issues.
  • Verifies all required dependencies are installed.
  • Checks provider configurations.
  • Provides actionable troubleshooting advice.
• .env auto-discovery: Configuration now automatically discovers .env files by walking up from the current directory.
  • Supports nested project structures.
  • Falls back to default locations if not found.
• get_index_status API: New pipeline.get_index_status(source_url) method to check if a source is indexed without triggering re-indexing.
  • Returns indexing status: not_indexed, indexed, or failed.
  • Useful for checking pipeline state before queries.

Changed

• BudgetGovernor refactor: Split into separate modules for better maintainability.
  • budget.py - In-memory budget tracking
  • budget_store_sqlite.py - SQLite-backed persistent storage
  • protocols/budget_store.py - Protocol definition for custom stores