feat(10-01): KB ingestion pipeline - migration, extractors, API router

- Migration 014: add status/error_message/chunk_count to kb_documents, make agent_id nullable
- Add GOOGLE_CALENDAR to ChannelTypeEnum in tenant.py
- Add brave_api_key, firecrawl_api_key, google_client_id/secret, minio_kb_bucket to config
- Add text extractors for PDF, DOCX, PPTX, XLSX/XLS, CSV, TXT, MD
- Add KB management API router with upload, list, delete, URL ingest, reindex endpoints
- Install pypdf, python-docx, python-pptx, openpyxl, pandas, firecrawl-py, youtube-transcript-api
- Update .env.example with new env vars
- Unit tests: test_extractors.py (10 tests) and test_kb_upload.py (7 tests) all pass

packages/orchestrator/pyproject.toml

@@ -14,6 +14,15 @@ dependencies = [
     "httpx>=0.28.0",
     "sentence-transformers>=3.0.0",
     "jsonschema>=4.26.0",
+    "pypdf>=6.9.2",
+    "python-docx>=1.2.0",
+    "python-pptx>=1.0.2",
+    "openpyxl>=3.1.5",
+    "pandas>=3.0.1",
+    "firecrawl-py>=4.21.0",
+    "youtube-transcript-api>=1.2.4",
+    "google-api-python-client>=2.193.0",
+    "google-auth-oauthlib>=1.3.0",
 ]
 
 [tool.uv.sources]