chore: import storyforge baseline clean

Common/MAC_NODE_CONNECTIVITY_SPEC.md

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+# StoryForge Mac AI Node — Server Connectivity Specification
+
+The Mac node should only do the following:
+
+1. Deploy FastGPT locally
+2. Ensure the cloud backend can reach FastGPT
+3. Maintain a private network connection to the server
+4. Provide the FastGPT endpoint to the backend
+
+Recommended ports:
+
+- FastGPT: 3000
+- MongoDB: 27017
+- PostgreSQL: 5432
+- Redis: 6379
+- MinIO: 9000
+
+FastGPT must not be exposed to the public internet directly.