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/tests/test_plex_overlay.py

@@ -5,6 +5,7 @@ browse scope. Also covers the canonical-guid parse and that the generated search
 Uses the DB lane (`db` fixture) — skipped when no Postgres is reachable. Runs against the real schema
 (migrations 0063/0064) so the JSONB + STORED generated columns are exercised.
 """
+
 from sqlalchemy import func, select
 
 import app.plex.sync as syncmod
@@ -25,7 +26,12 @@ class _StubPlex:
 
 
 def _hu_movie(rk: str, title: str, summary: str, genres: list[str], guid: str | None) -> dict:
-    meta = {"ratingKey": rk, "title": title, "summary": summary, "Genre": [{"tag": g} for g in genres]}
+    meta = {
+        "ratingKey": rk,
+        "title": title,
+        "summary": summary,
+        "Genre": [{"tag": g} for g in genres],
+    }
     if guid:
         meta["Guid"] = [{"id": guid}]
     return meta
@@ -68,7 +74,9 @@ def test_sync_overlay_writes_hu_onto_matched_en_rows(db):
     assert matched.title_hu == "Öldöklés"
     assert matched.summary_hu == "Egy rablás terve."
     assert matched.genres_hu == ["Akció", "Krimi"]
-    assert matched.search_vector_hu is not None  # the STORED generated column populated from title_hu
+    assert (
+        matched.search_vector_hu is not None
+    )  # the STORED generated column populated from title_hu
     # The unmatched EN row keeps NULL HU fields (serving falls back to EN).
     assert unmatched.title_hu is None
     assert stats["overlaid"] == 1
@@ -110,8 +118,11 @@ class _StubClient:
         elif key == "9":
             items = [
                 {
-                    "ratingKey": "hu1", "title": "Öldöklés", "summary": "Rablás.",
-                    "Genre": [{"tag": "Akció"}], "Guid": [{"id": "tmdb://1"}],
+                    "ratingKey": "hu1",
+                    "title": "Öldöklés",
+                    "summary": "Rablás.",
+                    "Genre": [{"tag": "Akció"}],
+                    "Guid": [{"id": "tmdb://1"}],
                 }
             ]
         else:
@@ -158,8 +169,14 @@ def test_overlay_reconcile_clears_stale_hu_when_twin_vanishes(db):
     db.flush()
     hu_lib.overlay_of = en_lib.id
     row = PlexItem(
-        rating_key="m1", library_id=en_lib.id, kind="movie", title="Heat",
-        guid="tmdb:1", title_hu="Öldöklés", summary_hu="régi", genres_hu=["Akció"],
+        rating_key="m1",
+        library_id=en_lib.id,
+        kind="movie",
+        title="Heat",
+        guid="tmdb:1",
+        title_hu="Öldöklés",
+        summary_hu="régi",
+        genres_hu=["Akció"],
     )
     db.add(row)
     db.commit()
@@ -185,7 +202,13 @@ def test_overlay_applies_to_all_editions_sharing_a_guid(db):
     db.flush()
     hu_lib.overlay_of = en_lib.id
     ed1 = PlexItem(rating_key="a", library_id=en_lib.id, kind="movie", title="Heat", guid="tmdb:1")
-    ed2 = PlexItem(rating_key="b", library_id=en_lib.id, kind="movie", title="Heat (Director's Cut)", guid="tmdb:1")
+    ed2 = PlexItem(
+        rating_key="b",
+        library_id=en_lib.id,
+        kind="movie",
+        title="Heat (Director's Cut)",
+        guid="tmdb:1",
+    )
     db.add_all([ed1, ed2])
     db.commit()