refactor: serve MCP bundles under <name>/mcp with nginx guard; rename core->mcp_server

- collect.py: copy repo MCP bundles to ROOT/<name>/mcp (instead of ROOT/mcp/<name>); add nginx location guard to deny /<name>/mcp/
- config.py: bundle roots now point to <repo>/mcp and standards/mcp for static bundles
- Rename core.py -> mcp_server.py and update imports in main.py and registry.py
- Dockerfile: per-repo MCP COPYs under /app/<name>/mcp, drop blog copy; add ports 8008/8009 in .drone.yml
- Restore standards/mcp/libraries.json from git for registry server

openapi-first/mcp/modules/openapi_first.templates.vet_app.sse.json

@@ -0,0 +1,44 @@
+{
+  "module": "openapi_first.templates.vet_app.sse",
+  "content": {
+    "path": "openapi_first.templates.vet_app.sse",
+    "docstring": null,
+    "objects": {
+      "asyncio": {
+        "name": "asyncio",
+        "kind": "alias",
+        "path": "openapi_first.templates.vet_app.sse.asyncio",
+        "signature": "<bound method Alias.signature of Alias('asyncio', 'asyncio')>",
+        "docstring": null
+      },
+      "random": {
+        "name": "random",
+        "kind": "alias",
+        "path": "openapi_first.templates.vet_app.sse.random",
+        "signature": "<bound method Alias.signature of Alias('random', 'random')>",
+        "docstring": null
+      },
+      "json": {
+        "name": "json",
+        "kind": "alias",
+        "path": "openapi_first.templates.vet_app.sse.json",
+        "signature": "<bound method Alias.signature of Alias('json', 'json')>",
+        "docstring": null
+      },
+      "subscribe": {
+        "name": "subscribe",
+        "kind": "function",
+        "path": "openapi_first.templates.vet_app.sse.subscribe",
+        "signature": "<bound method Function.signature of Function('subscribe', 33, 37)>",
+        "docstring": null
+      },
+      "unsubscribe": {
+        "name": "unsubscribe",
+        "kind": "function",
+        "path": "openapi_first.templates.vet_app.sse.unsubscribe",
+        "signature": "<bound method Function.signature of Function('unsubscribe', 40, 48)>",
+        "docstring": null
+      }
+    }
+  }
+}