feat: richer profile stats, wrapup min-count filter, watch medium distribution

- filter wrapup top directors/actors with count < 2
- add watch_medium to wrapup report + adapters
- profile trends: genre breakdown, rating histogram, watch medium dist
- fix unused StarDisplay import in movie detail

crates/domain/src/testing/fakes.rs

@@ -226,6 +226,9 @@ impl StatsRepository for FakeStatsRepository {
             monthly_ratings: vec![],
             top_directors: vec![],
             max_director_count: 0,
+            top_genres: vec![],
+            rating_distribution: [0; 5],
+            watch_medium_distribution: vec![],
         })
     }