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/sysconfig.py

@@ -7,6 +7,7 @@ bounds, and whether it's a secret. The resolver returns the DB override if one i
 stored Fernet-encrypted at rest (requires TOKEN_ENCRYPTION_KEY; without it, secrets can't be
 stored in the DB and stay env-only).
 """
+
 import logging
 from dataclasses import dataclass
 
@@ -46,15 +47,35 @@ SPECS: tuple[ConfigSpec, ...] = (
     ConfigSpec("smtp_password", "str", "email", "smtp_password", secret=True),
     # --- Quota (shared YouTube Data API daily budget) ---
     ConfigSpec("quota_daily_budget", "int", "quota", "quota_daily_budget", min=1, max=1_000_000),
-    ConfigSpec("backfill_quota_reserve", "int", "quota", "backfill_quota_reserve", min=0, max=1_000_000),
-    ConfigSpec("search_daily_limit_per_user", "int", "quota", "search_daily_limit_per_user", min=0, max=100_000),
+    ConfigSpec(
+        "backfill_quota_reserve", "int", "quota", "backfill_quota_reserve", min=0, max=1_000_000
+    ),
+    ConfigSpec(
+        "search_daily_limit_per_user",
+        "int",
+        "quota",
+        "search_daily_limit_per_user",
+        min=0,
+        max=100_000,
+    ),
     # Live-search source: "scrape" (InnerTube, zero API quota) or "api" (search.list, 100u/page).
     ConfigSpec("search_source", "str", "quota", "search_source"),
     # --- Backfill (recent-first first pass per channel) ---
-    ConfigSpec("backfill_recent_max_videos", "int", "backfill", "backfill_recent_max_videos", min=1, max=100_000),
-    ConfigSpec("backfill_recent_max_days", "int", "backfill", "backfill_recent_max_days", min=1, max=36_500),
+    ConfigSpec(
+        "backfill_recent_max_videos",
+        "int",
+        "backfill",
+        "backfill_recent_max_videos",
+        min=1,
+        max=100_000,
+    ),
+    ConfigSpec(
+        "backfill_recent_max_days", "int", "backfill", "backfill_recent_max_days", min=1, max=36_500
+    ),
     # --- Shorts probe ---
-    ConfigSpec("shorts_probe_max_seconds", "int", "shorts", "shorts_probe_max_seconds", min=1, max=3_600),
+    ConfigSpec(
+        "shorts_probe_max_seconds", "int", "shorts", "shorts_probe_max_seconds", min=1, max=3_600
+    ),
     ConfigSpec("shorts_probe_batch", "int", "shorts", "shorts_probe_batch", min=1, max=10_000),
     # --- Batch sizes ---
     ConfigSpec("enrich_batch_size", "int", "batch", "enrich_batch_size", min=1, max=50),
@@ -62,7 +83,14 @@ SPECS: tuple[ConfigSpec, ...] = (
     # --- Maintenance (rolling re-validation of already-known videos) ---
     # Videos re-checked per maintenance run. Folded here from app_state (B-core-11) so every admin
     # knob lives in one store; read by sync/maintenance.py, tuned from the Scheduler dashboard.
-    ConfigSpec("maintenance_revalidate_batch", "int", "maintenance", "maintenance_revalidate_batch", min=100, max=100_000),
+    ConfigSpec(
+        "maintenance_revalidate_batch",
+        "int",
+        "maintenance",
+        "maintenance_revalidate_batch",
+        min=100,
+        max=100_000,
+    ),
     # --- Discovery cleanup (search + explore ephemeral content) ---
     # Days an explored-but-unsubscribed channel is kept before the cleanup job purges it.
     ConfigSpec("explore_grace_days", "int", "explore", "explore_grace_days", min=0, max=3_650),
@@ -80,13 +108,40 @@ SPECS: tuple[ConfigSpec, ...] = (
     ConfigSpec("allow_registration", "bool", "access", "allow_registration"),
     # --- Download center (yt-dlp) — per-user defaults + retention/GC + layout ---
     ConfigSpec("download_total_max_bytes", "int", "downloads", "download_total_max_bytes", min=0),
-    ConfigSpec("download_default_max_bytes", "int", "downloads", "download_default_max_bytes", min=0),
-    ConfigSpec("download_default_max_concurrent", "int", "downloads", "download_default_max_concurrent", min=1, max=20),
-    ConfigSpec("download_default_max_jobs", "int", "downloads", "download_default_max_jobs", min=1, max=100_000),
-    ConfigSpec("download_retention_days", "int", "downloads", "download_retention_days", min=0, max=3_650),
-    ConfigSpec("download_gc_grace_days", "int", "downloads", "download_gc_grace_days", min=0, max=3_650),
+    ConfigSpec(
+        "download_default_max_bytes", "int", "downloads", "download_default_max_bytes", min=0
+    ),
+    ConfigSpec(
+        "download_default_max_concurrent",
+        "int",
+        "downloads",
+        "download_default_max_concurrent",
+        min=1,
+        max=20,
+    ),
+    ConfigSpec(
+        "download_default_max_jobs",
+        "int",
+        "downloads",
+        "download_default_max_jobs",
+        min=1,
+        max=100_000,
+    ),
+    ConfigSpec(
+        "download_retention_days", "int", "downloads", "download_retention_days", min=0, max=3_650
+    ),
+    ConfigSpec(
+        "download_gc_grace_days", "int", "downloads", "download_gc_grace_days", min=0, max=3_650
+    ),
     ConfigSpec("download_layout", "str", "downloads", "download_layout"),
-    ConfigSpec("download_worker_concurrency", "int", "downloads", "download_worker_concurrency", min=1, max=16),
+    ConfigSpec(
+        "download_worker_concurrency",
+        "int",
+        "downloads",
+        "download_worker_concurrency",
+        min=1,
+        max=16,
+    ),
     ConfigSpec("sponsorblock_default", "bool", "downloads", "sponsorblock_default"),
     # --- Audit log ---
     # Days to keep admin audit-log rows before the audit_gc job prunes them (0 = keep forever).
@@ -155,7 +210,8 @@ def _raw_override(db: Session, key: str) -> str | None:
             _decrypt_warned.add(key)
             log.warning(
                 "config %r could not be decrypted (TOKEN_ENCRYPTION_KEY changed or missing?) — falling "
-                "back to the env/config default; the key must not change once secrets are stored", key,
+                "back to the env/config default; the key must not change once secrets are stored",
+                key,
             )
         return None