```

chore: refactor logging module, update genesis timestamp, remove model relationships, and reorganize routers

- Rename logging.py to logger.py and update import paths in poa.py and main.py
- Update devnet genesis timestamp to 1766828620
- Remove SQLModel Relationship declarations from Block, Transaction, and Receipt models
- Add SessionDep type alias and get_session dependency in coordinator-api deps
- Reorganize coordinator-api routers: replace explorer/registry with exchange, users, marketplace

docs/developer/api/coordinator/openapi.md

@@ -0,0 +1,79 @@
+---
+title: OpenAPI Specification
+description: Complete OpenAPI specification for the Coordinator API
+---
+
+# OpenAPI Specification
+
+The complete OpenAPI 3.0 specification for the AITBC Coordinator API is available below.
+
+## Interactive Documentation
+
+- [Swagger UI](https://aitbc.bubuit.net/api/docs) - Interactive API explorer
+- [ReDoc](https://aitbc.bubuit.net/api/redoc) - Alternative documentation view
+
+## Download Specification
+
+- [JSON Format](openapi.json) - Raw OpenAPI JSON
+- [YAML Format](openapi.yaml) - OpenAPI YAML format
+
+## Key Endpoints
+
+### Jobs
+- `POST /v1/jobs` - Create a new job
+- `GET /v1/jobs/{job_id}` - Get job details
+- `GET /v1/jobs` - List jobs
+- `DELETE /v1/jobs/{job_id}` - Cancel job
+- `GET /v1/jobs/{job_id}/results` - Get job results
+
+### Marketplace
+- `POST /v1/marketplace/offers` - Create offer
+- `GET /v1/marketplace/offers` - List offers
+- `POST /v1/marketplace/offers/{offer_id}/accept` - Accept offer
+
+### Receipts
+- `GET /v1/receipts/{job_id}` - Get receipt
+- `POST /v1/receipts/verify` - Verify receipt
+
+### Analytics
+- `GET /v1/marketplace/stats` - Get marketplace statistics
+- `GET /v1/miners/{miner_id}/stats` - Get miner statistics
+
+## Authentication
+
+All endpoints require authentication via the `X-API-Key` header.
+
+## Rate Limits
+
+API requests are rate-limited based on your subscription plan.
+
+## WebSocket API
+
+Real-time updates available at:
+- WebSocket: `wss://aitbc.bubuit.net/ws`
+- Message types: job_update, marketplace_update, receipt_created
+
+## Code Generation
+
+Use the OpenAPI spec to generate client libraries:
+
+```bash
+# OpenAPI Generator
+openapi-generator-cli generate -i openapi.json -g python -o ./client/
+
+# Or use the online generator at https://openapi-generator.tech/
+```
+
+## SDK Integration
+
+The OpenAPI spec is integrated into our official SDKs:
+- [Python SDK](../../developer-guide/sdks/python.md)
+- [JavaScript SDK](../../developer-guide/sdks/javascript.md)
+
+## Support
+
+For API support:
+- 📖 [API Documentation](endpoints.md)
+- 🐛 [Report Issues](https://github.com/aitbc/issues)
+- 💬 [Discord](https://discord.gg/aitbc)
+- 📧 [api-support@aitbc.io](mailto:api-support@aitbc.io)