Two coupled bugs surfaced 2026-05-31 by the Subscriptions UI showing
"phantom" subscriptions like `sidecar:patreon:dpmaker`:
1. `SourceService.list()` returned every Source, no filter on URL.
alembic 0022 (2026-05-26) consolidated old per-post-URL Sources into
one canonical row per (artist, platform); when no real campaign URL
was salvageable it rewrote the canonical to `sidecar:<plat>:<slug>`
enabled=false as a disabled anchor. The UI then listed those
anchors as if they were polls — disabled, but visible. Fix: `list()`
excludes `url LIKE 'sidecar:%'` by default; `include_synthetic=True`
opts back in for admin tooling.
2. `importer._source_for_sidecar` picked the lowest-id Source for
(artist, platform). When alembic 0022 had rewritten a per-post row
into a synthetic anchor (lower id) AND the operator later added the
real subscription (higher id), every gallery-dl download silently
attached its Post to the SYNTHETIC instead of the real Source. Fix:
prefer a non-`sidecar:%` URL when one exists; fall back to the
synthetic; only create a new synthetic when nothing exists for
(artist, platform).
alembic 0028 is the data half: for every (artist, platform) with both
a synthetic AND a real Source, pre-merge Post+ImageProvenance
collisions on the canonical, bulk-repoint Posts/ImageProvenance/
DownloadEvent.source_id onto the real Source, and delete the
synthetic. Lone synthetics (no real twin) are left intact — they
anchor real imported content the operator may still want; the
list-filter hides them so they no longer surface as phantoms.
The `select(ImportSettings).where(id == 1)).scalar_one()` singleton load was
repeated 15× across services, API, and 5 task modules. Added async load() +
sync load_sync() classmethods on the model and migrated all 15 full-row sites
(callers already imported ImportSettings, so no new imports; dropped download's
now-orphaned select import). Left maintenance.py's deliberate column-select
(import_scan_path only) as-is.
Rest of the service layer was already adequately DRY — the Record/to_dict
pattern is only 2 instances and the savepoint find-or-create recovery is
correctly per-entity, so neither was forced into a shared abstraction.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
D1 scheduler visibility: AppSetting last-tick stamp on every Beat tick +
GET /api/sources/schedule-status (last_tick_at/next_due_at/due_now/auto_sources)
+ SchedulerStatusBar on the Subscriptions tab (re-polled every 30s).
D2 failing-source rollup: ?failing=true on the sources list + FailingSourcesCard
on Downloads with per-source and bulk "retry" (re-runs the feed via /check).
D3 activity sparkline: GET /api/downloads/activity hourly buckets + CSS bar
chart by the stat chips (failures stacked in error color); refreshes on live poll.
D4 credential staleness: surface last_verified age + "re-verify recommended"
warning past 30d; also fixes the dead last_verified_at field-name mismatch so
the verification row renders at all.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
bvandeusen