feat(mcp): подготовить сервер и доступ к приёмке

deploy/env.test.example

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+# Save as /opt/mmapp-test/.env on the test server (mode 0600).
+# Generate unique hex secrets on that server; never reuse production credentials.
+POSTGRES_PASSWORD=
+AUTH_JWT_SECRET=
+MMAPP_IMAGE_TAG=ux-673e5ba
+# Optional backend-only image tag; blank uses MMAPP_IMAGE_TAG.
+BACKEND_IMAGE_TAG=
+AUTH_REQUIRED=false
+AUTH_ISSUER=https://auth.test.local
+AUTH_PORTAL_URL=http://localhost:5175
+CORS_ORIGIN=http://localhost:3000