refactor(agent): extract shared scanner iteration into _find_model_entry

_Previous_ _find_scanner_for_model and identify_model_type contained ~25 lines
of identical scanner-iteration + path-matching logic.  Factor it into
_find_model_entry() so a new scanner type or edge-case fix can't drift apart.

py/metadata_ops/__init__.py

@@ -41,14 +41,12 @@ SCANNER_TYPE_MAP: dict[str, str] = {
 SCANNER_GETTER_NAMES = tuple(SCANNER_TYPE_MAP.keys())
 
 
-async def _find_scanner_for_model(
+async def _find_model_entry(
     model_path: str,
-) -> tuple[object, object] | tuple[None, None]:
-    """Find the (scanner, cache_entry) responsible for *model_path*.
-
-    Iterates all known scanner types and returns the first one whose cache
-    contains the given path.  Returns ``(None, None)`` when no scanner
-    claims the model.
+) -> tuple[object, object, str | None] | tuple[None, None, None]:
+    """Iterate all scanners and return the first (scanner, entry, getter_name)
+    that owns *model_path*.  Returns ``(None, None, None)`` when no scanner
+    claims it.
     """
     from ..services.service_registry import ServiceRegistry
 
@@ -64,47 +62,31 @@ async def _find_scanner_for_model(
             cache = await scanner.get_cached_data()
             for entry in cache.raw_data:
                 if os.path.normpath(entry.get("file_path", "")) == normalized:
-                    return scanner, entry
+                    return scanner, entry, getter_name
         except Exception as exc:
             logger.debug(
                 "Scanner %s check failed for %s: %s",
-                getter_name,
-                model_path,
-                exc,
+                getter_name, model_path, exc,
             )
-    return None, None
+    return None, None, None
+
+
+async def _find_scanner_for_model(
+    model_path: str,
+) -> tuple[object, object] | tuple[None, None]:
+    """Find the (scanner, cache_entry) responsible for *model_path*."""
+    scanner, entry, _ = await _find_model_entry(model_path)
+    return scanner, entry
 
 
 async def identify_model_type(model_path: str) -> str:
     """Determine the model type (``\"lora\"``, ``\"checkpoint\"``, or
     ``\"embedding\"``) for *model_path*.
 
-    Iterates all known scanners; the first scanner that claims the path
-    determines the type.  Falls back to ``\"lora\"`` when unknown.
+    Falls back to ``\"lora\"`` when unknown.
     """
-    from ..services.service_registry import ServiceRegistry
-
-    normalized = os.path.normpath(model_path)
-    for getter_name in SCANNER_GETTER_NAMES:
-        getter = getattr(ServiceRegistry, getter_name, None)
-        if getter is None:
-            continue
-        try:
-            scanner = await getter()
-            if scanner is None:
-                continue
-            cache = await scanner.get_cached_data()
-            for entry in cache.raw_data:
-                if os.path.normpath(entry.get("file_path", "")) == normalized:
-                    return SCANNER_TYPE_MAP[getter_name]
-        except Exception as exc:
-            logger.debug(
-                "identify_model_type scanner %s error for %s: %s",
-                getter_name,
-                model_path,
-                exc,
-            )
-    return "lora"
+    _, _, getter_name = await _find_model_entry(model_path)
+    return SCANNER_TYPE_MAP[getter_name] if getter_name else "lora"
 
 
 # ---------------------------------------------------------------------------