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

mongo-ops/mcp/nav.json

@@ -0,0 +1,62 @@
+[
+  {
+    "module": "mongo_ops",
+    "resource": "doc://modules/mongo_ops"
+  },
+  {
+    "module": "mongo_ops.cache",
+    "resource": "doc://modules/mongo_ops.cache"
+  },
+  {
+    "module": "mongo_ops.cache.backend",
+    "resource": "doc://modules/mongo_ops.cache.backend"
+  },
+  {
+    "module": "mongo_ops.cache.config",
+    "resource": "doc://modules/mongo_ops.cache.config"
+  },
+  {
+    "module": "mongo_ops.cache.in_memory",
+    "resource": "doc://modules/mongo_ops.cache.in_memory"
+  },
+  {
+    "module": "mongo_ops.cache.redis_backend",
+    "resource": "doc://modules/mongo_ops.cache.redis_backend"
+  },
+  {
+    "module": "mongo_ops.cache.repository",
+    "resource": "doc://modules/mongo_ops.cache.repository"
+  },
+  {
+    "module": "mongo_ops.connection",
+    "resource": "doc://modules/mongo_ops.connection"
+  },
+  {
+    "module": "mongo_ops.models",
+    "resource": "doc://modules/mongo_ops.models"
+  },
+  {
+    "module": "mongo_ops.populate",
+    "resource": "doc://modules/mongo_ops.populate"
+  },
+  {
+    "module": "mongo_ops.populate.engine",
+    "resource": "doc://modules/mongo_ops.populate.engine"
+  },
+  {
+    "module": "mongo_ops.populate.rules",
+    "resource": "doc://modules/mongo_ops.populate.rules"
+  },
+  {
+    "module": "mongo_ops.registry",
+    "resource": "doc://modules/mongo_ops.registry"
+  },
+  {
+    "module": "mongo_ops.repository",
+    "resource": "doc://modules/mongo_ops.repository"
+  },
+  {
+    "module": "mongo_ops.transactions",
+    "resource": "doc://modules/mongo_ops.transactions"
+  }
+]