quickai v0.2.0

export command — machine-readable JSON aggregate dump for external ingestion (quickai export [--project X] [--pretty] [--format json]). Thanks @keksmd for the initial implementation (#3).

• summary + by_project/model/agent_type + tools + waste + latency in one stable JSON with schema_version
• --format enum (json today; extensible)
• pure serialization of existing query aggregates — no new SQL, backwards compatible