Add MindSpace service runtime release chain

mindspace-service/README.md

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+# MindSpace Service
+
+Standalone MindSpace service source tracked inside the Memind repo.
+
+This service is deployed to production as a separate runtime artifact under
+`/Users/john/MindSpace` and exposes the shared adapter RPC contract that Memind
+can call through `MINDSPACE_SERVER_ADAPTER=remote`.
+
+Production defaults:
+
+- MindSpace service listens on `127.0.0.1:8082`
+- Memind remains on `127.0.0.1:8081`
+- Runtime code lives at `/Users/john/MindSpace`
+- Runtime data continues to use the existing persisted Memind directories:
+  `MindSpace/`, `data/mindspace/`, and `users/`
+
+Key scripts in this repo:
+
+- `node scripts/build-mindspace-service-runtime.mjs`
+- `bash scripts/release-mindspace-service-prod.sh --yes`