feat(devtools): add memory-service & tool-engine management, fix .gitignore

- Add memory-service and tool-engine to devtools config (ports, env, healthUrl)
- Add GOWORK=off to process-manager build for Go workspace compatibility
- Update DB check and startup order to include new services
- Add backend/tool-engine/main to .gitignore for Go binary

.gitignore

@@ -30,6 +30,7 @@ backend/iot-debug-service/iot-debug-service
 backend/memory-service/main
 backend/memory-service/cmd/main
 backend/memory-service/memory-service
+backend/tool-engine/main
 backend/tool-engine/cmd/tool-engine
 backend/tool-engine/tool-engine
 backend/voice-service/voice-service