refactor: move mcp source registry to wf_sources_mcp

src/wf_sources_mcp/__init__.py

@@ -1,5 +1,14 @@
+"""MCP upstream-source provider helpers.
+
+Source registry symbols are exported lazily because importing them eagerly pulls
+in compatibility `wf_mcp` DTOs, which can re-enter this package through
+`wf_mcp.auth` during startup.
+"""
+
 from __future__ import annotations
 
+from typing import TYPE_CHECKING
+
 from .auth import (
     AuthRecord,
     auth_missing_diagnostic,
@@ -11,13 +20,56 @@ from .auth import (
     neutral_auth_from_mcp,
 )
 
+if TYPE_CHECKING:
+    from .source_registry import (
+        FileSourceRegistryStore,
+        HttpSourceTransport,
+        McpSourceRegistryEntry,
+        SourceRegistryFile,
+        SourceRegistryStore,
+        SourceTransport,
+        StdioSourceTransport,
+        connection_config_to_registry_entry,
+        registry_entry_to_connection_config,
+        workflow_mcp_source_to_connection_config,
+    )
+
 __all__ = [
     "AuthRecord",
+    "FileSourceRegistryStore",
+    "HttpSourceTransport",
+    "McpSourceRegistryEntry",
+    "SourceRegistryFile",
+    "SourceRegistryStore",
+    "SourceTransport",
+    "StdioSourceTransport",
     "auth_missing_diagnostic",
     "auth_ref_for_connection",
     "connection_auth_diagnostic",
+    "connection_config_to_registry_entry",
     "mcp_auth_env",
     "mcp_auth_from_neutral",
     "mcp_auth_headers",
     "neutral_auth_from_mcp",
+    "registry_entry_to_connection_config",
+    "workflow_mcp_source_to_connection_config",
 ]
+
+
+def __getattr__(name: str) -> object:
+    if name in {
+        "FileSourceRegistryStore",
+        "HttpSourceTransport",
+        "McpSourceRegistryEntry",
+        "SourceRegistryFile",
+        "SourceRegistryStore",
+        "SourceTransport",
+        "StdioSourceTransport",
+        "connection_config_to_registry_entry",
+        "registry_entry_to_connection_config",
+        "workflow_mcp_source_to_connection_config",
+    }:
+        from . import source_registry
+
+        return getattr(source_registry, name)
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")