style: apply ruff format across backend + scripts (line-length 100)

Mechanical, whole-tree `ruff format` pass — no behaviour change. Recorded in
.git-blame-ignore-revs (next commit) so git blame skips it.

backend/app/sync/maintenance.py

@@ -19,6 +19,7 @@ flag an `upcoming` premiere that blew past its scheduled start and never went li
 Quota: phase 1 costs ~(flagged / 50) units, phase 2 ~(batch / 50). Both respect the same
 backfill reserve as the other jobs so interactive syncs never starve.
 """
+
 import logging
 from datetime import timedelta
 
@@ -132,11 +133,7 @@ def _notify_removed(db: Session, impact: dict[int, list[dict]]) -> int:
 
 def _recheck_flagged(db: Session, yt: YouTubeClient) -> dict:
     """Phase 1: recover or hard-delete videos already flagged unavailable."""
-    flagged = (
-        db.execute(select(Video).where(Video.unavailable_since.is_not(None)))
-        .scalars()
-        .all()
-    )
+    flagged = db.execute(select(Video).where(Video.unavailable_since.is_not(None))).scalars().all()
     if not flagged:
         return {"checked": 0, "recovered": 0, "deleted": 0, "notified": 0}
     progress.report(0, len(flagged), "recheck")
@@ -181,7 +178,9 @@ def _recheck_flagged(db: Session, yt: YouTubeClient) -> dict:
 def _revalidate_rolling(db: Session, yt: YouTubeClient) -> dict:
     """Phase 2: re-check the least-recently-checked currently-available videos and flag any
     that have become unplayable (hidden immediately; deleted later if they don't recover)."""
-    batch = sysconfig.get_int(db, "maintenance_revalidate_batch")  # admin override, else config default
+    batch = sysconfig.get_int(
+        db, "maintenance_revalidate_batch"
+    )  # admin override, else config default
     flagged_new = 0
     checked = 0
     now = _now()