Add GET /tools/environment endpoint that fetches weather, forecast, sun times,
and air quality data from user's volatile Qdrant collection.
- Add qdrant-client dependency
- Create QdrantReadClient wrapper for read-only queries
- Add environment schemas and service in tools domain
- Parse weather, forecast, sun times, and air quality from Qdrant payloads
- Support user-specific collections via preferred_username from OIDC
- Add comprehensive service tests (13 tests)
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
