When CivArchive returns HTTP 429 with a large retry_after, the bulk
metadata refresh would block for hours because:
1. FallbackMetadataProvider raised RateLimitError instead of continuing
to the next provider (e.g., SQLite archive was never reached).
2. _RateLimitRetryHelper retried long-rate-limit 429s 3 times — all
futile since the hourly cap hasn't reset.
3. The batch loop had no awareness of persistent rate-limiting,
causing 192+ models to each hammer the same rate-limited endpoint.
Changes:
- FallbackMetadataProvider: all 6 methods now continue to next provider
on RateLimitError instead of raising (model_metadata_provider.py)
- fetch_and_update_model: deleted-model path also continues on
RateLimitError so sqlite provider gets a chance (metadata_sync_service.py)
- _RateLimitRetryHelper: when retry_after >= 120s, only 1 attempt is
made — retries are futile for hour-scale rate limits
- BulkMetadataRefreshUseCase: tracks consecutive rate-limit failures
and aborts early after 3 (bulk_metadata_refresh_use_case.py)
Tests: updated test_fallback_respects_retry_limit for new continue
behavior; added tests for large/small retry_after thresholds.
- Allow empty sha256 when hash_status is 'pending' in cache entry validator
- Add on-demand hash calculation during bulk metadata refresh for checkpoints
with pending hash status
- Add comprehensive tests for both fixes
Fixes issue where checkpoints in extra paths were not visible in UI and
not processed during bulk metadata refresh due to empty sha256.
When enable_metadata_archive_db=True, the previous filter logic would
repeatedly try to fetch metadata for models that were already confirmed
to not exist on CivitAI (from_civitai=False, civitai_deleted=True).
The fix adds a skip condition to exclude models that:
1. Are confirmed not from CivitAI (from_civitai=False)
2. Are marked as deleted/not found on CivitAI (civitai_deleted=True)
3. Either have no archive DB enabled, or have already been checked (db_checked=True)
This prevents unnecessary API calls to CivArchive for user-trained models
or models from non-CivitAI sources.
Fixes repeated "Error fetching version of CivArchive model by hash" logs
for models that will never be found on CivitAI/CivArchive.
