feat(relink): accept CivitArchive URLs when linking models

py/services/metadata_sync_service.py

@@ -419,14 +419,37 @@ class MetadataSyncService:
         metadata: Dict[str, Any],
         model_id: int,
         model_version_id: Optional[int],
+        provider_name: Optional[str] = None,
     ) -> Dict[str, Any]:
-        """Relink a local metadata record to a specific CivitAI model version."""
+        """Relink a local metadata record to a specific CivitAI model version.
+
+        When ``provider_name`` is given, the named provider is resolved via the
+        metadata provider selector instead of the default fallback chain. A
+        missing/disabled provider surfaces a user-friendly error instead of the
+        raw selector exception.
+        """
+
+        if provider_name:
+            try:
+                provider = await self._get_provider(provider_name)
+            except ValueError as exc:
+                logger.warning(
+                    "Unable to resolve metadata provider %s: %s", provider_name, exc
+                )
+                raise ValueError(
+                    "CivitArchive is not available or not enabled. "
+                    "Enable the CivitArchive API in settings to relink via CivArchive."
+                ) from exc
+        else:
+            provider = await self._get_default_provider()
 
-        provider = await self._get_default_provider()
         civitai_metadata = await provider.get_model_version(model_id, model_version_id)
         if not civitai_metadata:
+            provider_label = (
+                "CivitArchive" if provider_name == "civarchive_api" else "CivitAI"
+            )
             raise ValueError(
-                f"Model version not found on CivitAI for ID: {model_id}"
+                f"Model version not found on {provider_label} for ID: {model_id}"
                 + (f" with version: {model_version_id}" if model_version_id else "")
             )