fix(connections): correct deployment naming per mk-labs convention

Deployment name: connections → signal-cli-rest-api (what it IS)
Service name: connections (unchanged - Epcot-themed role)

Updated labels throughout deployment and service selector to match.

cluster/platform/connections/service.yaml

@@ -14,4 +14,4 @@ spec:
     protocol: TCP
     name: http
   selector:
-    app.kubernetes.io/name: connections
+    app.kubernetes.io/name: signal-cli-rest-api