feat: expose source registry admin reads

src/wf_mcp/broker/service/source_registry_admin.py

@@ -0,0 +1,21 @@
+from __future__ import annotations
+
+from collections.abc import Sequence
+from dataclasses import dataclass, field
+
+from ...models import ConnectionConfig
+from ...source_registry import SourceRegistryStore
+
+
+@dataclass(slots=True)
+class SourceRegistryAdminProvider:
+    """Read desired MCP source registry state without mutating it."""
+
+    source_registry_store: SourceRegistryStore
+    config_connections: Sequence[ConnectionConfig] = field(default_factory=tuple)
+
+    def list_registry_entries(self) -> list[object]:
+        return list(self.source_registry_store.load_registry().sources)
+
+    def config_source_ids(self) -> set[str]:
+        return {connection.id for connection in self.config_connections}