chore(python): audit providers copilot droid augment cline

Move the four providers onto _runtime and _shell_command; add
expected_runtime_scripts and extra artifact checks to _runtime.

Claude-Session: https://claude.ai/code/session_01Agoc9bRVE9KL7mmWtey9Vq

elydora/plugins/droid_config.py

@@ -8,13 +8,13 @@ from typing import Dict, List, Optional, Tuple
 
 from ._jsonc import JsonPathPart, JsoncEditor
 from ._managed_files import FileSnapshot
+from ._runtime import same_path
 from .droid_contract import (
     TOOL_EVENTS,
     DroidHookMap,
     JsonObject,
     managed_removals,
     read_hook_map,
-    same_path,
 )
 from .droid_policy import DroidPolicyState