style: keep parent-package imports ahead of sibling imports

Matches the layout used by the other service modules; no behaviour change.

py/services/civarchive_client.py

@@ -7,11 +7,11 @@ import logging
 import asyncio
 from copy import deepcopy
 from typing import Any, Optional, Dict, Tuple, List, cast
+from ..utils.constants import is_empty_placeholder_hash
 from .connectivity_guard import is_expected_offline_error
 from .model_metadata_provider import CivArchiveModelMetadataProvider, ModelMetadataProviderManager
 from .downloader import get_downloader
 from .errors import RateLimitError
-from ..utils.constants import is_empty_placeholder_hash
 
 logger = logging.getLogger(__name__)
 

py/services/model_metadata_provider.py

@@ -4,9 +4,9 @@ import json
 import logging
 import random
 from typing import Optional, Dict, Tuple, Any, List, Sequence
+from ..utils.constants import is_empty_placeholder_hash
 from .downloader import get_downloader
 from .errors import RateLimitError, ResourceNotFoundError
-from ..utils.constants import is_empty_placeholder_hash
 
 try:
     from bs4 import BeautifulSoup

py/services/model_sources/modelscope.py

@@ -46,6 +46,7 @@ import os
 import re
 from typing import TYPE_CHECKING, Any, Iterable, Mapping, Optional
 
+from ...utils.constants import is_empty_placeholder_hash
 from .base import (
     GROUP_PREFIXES,
     ModelCardContext,
@@ -57,7 +58,6 @@ from .base import (
     fetch_text,
     filter_weight_files,
 )
-from ...utils.constants import is_empty_placeholder_hash
 
 if TYPE_CHECKING:  # pragma: no cover - typing only
     from .base import ModelSourceCache