LINUS ROUND 2: Tests for automation + CRM handlers, fix vet errors

- automation/engine_test.go: 8 tests (cron parser, actions, start/stop)
- handlers/crm_test.go: 6 tests (CRUD + not-found)
- backend/main_test.go: config validation test
- Fixed websocket unreachable code
- Deleted events/kafka.go placeholder

backend/websocket/hub.go

@@ -99,33 +99,6 @@ func (h *Hub) HandleWebSocket(w http.ResponseWriter, r *http.Request) {
 	h.logger.Warn().Msg("websocket connection rejected: JWT validation not implemented")
 	w.WriteHeader(http.StatusUnauthorized)
 	return
-
-	conn, err := upgrader.Upgrade(w, r, nil)
-	if err != nil {
-		h.logger.Error().Err(err).Msg("websocket upgrade failed")
-		return
-	}
-
-	tenantID := r.URL.Query().Get("tenant_id")
-	userID := r.URL.Query().Get("user_id")
-
-	if tenantID == "" {
-		tenantID = "default"
-	}
-
-	client := &Client{
-		hub:      h,
-		conn:     conn,
-		send:     make(chan []byte, 256),
-		tenantID: tenantID,
-		userID:   userID,
-	}
-
-	client.hub.register <- client
-
-	// Start goroutines for reading and writing
-	go client.writePump()
-	go client.readPump()
 }
 
 // Broadcast sends a message to all connected clients