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/services/tests/wrapup_analyzer.rs

@@ -23,6 +23,7 @@ fn row(title: &str, rating: u8, ym: &str) -> WrapUpMovieRow {
         runtime_minutes: Some(100),
         budget_usd: None,
         original_language: Some("en".to_string()),
+        watch_medium: None,
         genres: vec!["Action".to_string()],
         keywords: vec![],
         cast_names: vec![],