Implement blacklisting for IPs and enhance follow list fetching

- Added functionality to handle blacklisted IPs, allowing connections to remain open until a timeout is reached.
- Introduced periodic fetching of admin follow lists to improve synchronization with relay data.
- Updated WebSocket message size limits to accommodate larger payloads.
- Enhanced logging for better traceability during follow list fetching and event processing.
- Refactored event subscription logic to improve clarity and maintainability.

cmd/benchmark/configs/strfry.conf

@@ -41,7 +41,7 @@ relay {
     }
 
     # Maximum accepted incoming websocket frame size (should be larger than max event) (restart required)
-    maxWebsocketPayloadSize = 131072
+    maxWebsocketPayloadSize = 104857600
 
     # Websocket-level PING message frequency (should be less than any reverse proxy idle timeouts) (restart required)
     autoPingSeconds = 55