```

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/operator/security.md

@@ -75,7 +75,7 @@ metadata:
 spec:
   tls:
   - hosts:
-    - api.aitbc.io
+    - aitbc.bubuit.net
     secretName: api-tls
 ```
 
@@ -137,13 +137,13 @@ ingress:
   tls:
     - secretName: coordinator-tls
       hosts:
-        - api.aitbc.io
+        - aitbc.bubuit.net
 ```
 
 #### Blockchain Node RPC
 ```yaml
 # WebSocket with TLS
-wss://api.aitbc.io:8080/ws
+wss://aitbc.bubuit.net/ws
 ```
 
 ### 2. API Authentication Middleware