Typed, loud failure mapping for the native Patreon ingester so a changed
API shape or expired auth never silently zero-downloads as "success".
- New ErrorType.API_DRIFT (free varchar error_type col → no migration):
distinct from auth so the operator knows the fix is updating the
ingester, not rotating cookies.
- patreon_client: PatreonAPIError carries status_code; new PatreonAuthError
for 401/403 + HTML-login/non-JSON bodies (reclassified from drift —
expired-session is auth, actionable as "rotate cookies").
- patreon_ingester._failure_result maps: PatreonAuthError→AUTH_ERROR,
PatreonDriftError→API_DRIFT ("Patreon API changed — ingester needs
update"), HTTP 429→RATE_LIMITED, 404→NOT_FOUND, other HTTP→HTTP_ERROR,
transport→NETWORK_ERROR. (429 thus drives the platform cooldown.)
- FailingSourcesCard: api_drift chip (red) + hint.
Contract test (new test_patreon_contract.py): the recorded /api/posts
fixture must parse end-to-end (no drift, 5 media across 4 posts) AND the
request params must still carry every field the parser depends on
(file_name, image_urls/download_url, images/attachments_media/media
includes, content/post_file/image post fields) — a trim of either trips a
red build. Plus client HTTP-status classification tests and ingester
error-type mapping tests.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
