fix(backend): update dev-config to match new keep alive

Author: JavierRibaldelRio

backend/cmd/dev-config.toml

@@ -30,7 +30,7 @@ backoff_max_ms = 999999        # Maximum backoff duration in milliseconds
 backoff_multiplier = 1         # Exponential backoff multiplier (e.g., 1.5 means each retry waits 1.5x longer)
 max_retries = 0                # Maximum retries before cycling (0 = infinite retries, recommended for persistent reconnection)
 connection_timeout_ms = 999999 # Timeout for the initial connection attempt
-keep_alive_ms = 0              # Keep-alive interval in milliseconds (0 to disable)
+keep_alive_interval_ms = 0     # Keep-alive interval in milliseconds (0 to disable)
 
 # UDP Configuration
 # These settings control the UDP server's buffer sizes and performance characteristics