Add website database schema and API routes

- Add database migration for websites table
- Add WebsiteDb model and API types
- Add API endpoints for website indexing (/sources/website/{domain}/...)
- Add integration with IndexSourceDb for job tracking
- Add Turbopuffer sync functionality for vector search
- Update OpenAPI spec with new endpoints

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <[email protected]>

Author: tsbhangu

.vscode/settings.json

@@ -37,5 +37,6 @@
   },
   "[typescriptreact]": {
     "editor.defaultFormatter": "biomejs.biome"
-  }
+  },
+  "typescript.tsserver.maxTsServerMemory": 4096
 }