feat: add genre, rating, and avoid-repeats trailer filters

Trailer selection now supports three optional filters:
- Genre match: prefer trailers whose fake-movie genre overlaps with the
  feature being played (requires TMDB genres in NFO)
- Age rating ceiling: exclude trailers rated higher than the feature
  (requires TMDB certification in NFO)
- Avoid repeats: cycle through all trailers before replaying any;
  resets per-user once the pool is exhausted

Genre and certification are fetched from TMDB at download time via a
single /movie/{id}?append_to_response=release_dates call and written
into the fake-movie NFO as <genre> and <mpaa> tags. All filters fall
back to the full unfiltered pool when no match is found.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

build.yaml

@@ -1,5 +1,5 @@
 ---
-version: 1.0.0.2
+version: 1.0.0.3
 name: CinemaTrailers4Jellyfins
 guid: b581493e-1046-40ed-b6dc-cb8027624984
 description: >
@@ -12,10 +12,10 @@ category: General
 owner: 514mart
 targetAbi: 10.11.0.0
 changelog:
-  - Add IIntroProvider support — downloaded trailers now play as pre-rolls before
-    movies in Jellyfin clients with cinema mode (Wholphin, etc.); configurable
-    trailers-per-movie count; recursion-safe so the intro items themselves never
-    trigger a second round of intro injection
+  - Add trailer selection filters — genre match, age rating ceiling, and avoid-repeats
+    cycle; genre and rating are written to each fake-movie NFO at download time from
+    TMDB so Jellyfin can use them for filtering; filters fall back to random when no
+    match is found
 
 dotnetProjects:
   - name: Jellyfin.Plugin.CinemaTrailers4Jellyfins