MediaRole auto-detection + manual role API + sync wiring (#7)

role_detector: classify items as Interstitial by collection name/tag patterns.
Wire chapter extraction + role detection into sync adapter (worker + presentation).
SQLite: persist/read role column, migration.
PUT /library/items/{id}/role endpoint for manual override.

crates/worker/src/main.rs

@@ -341,10 +341,16 @@ impl IProviderRegistry for SimpleProviderRegistry {
     }
 }
 
-fn provider_item_to_library_item(item: domain::MediaItem, provider_id: &str) -> domain::MediaItem {
+fn provider_item_to_library_item(
+    item: domain::MediaItem,
+    provider_id: &str,
+    role_config: &adapter_common::role_detector::RoleDetectionConfig,
+) -> domain::MediaItem {
     let external_id = item.id().value().to_string();
     let now = chrono::Utc::now().to_rfc3339();
 
+    let role = adapter_common::role_detector::detect_role(&item, role_config);
+
     domain::MediaItem::from_persistence(domain::MediaItemRow {
         id: domain::MediaItemId::new(format!("{}::{}", provider_id, external_id)),
         provider_id: provider_id.to_string(),
@@ -360,22 +366,26 @@ fn provider_item_to_library_item(item: domain::MediaItem, provider_id: &str) ->
         genres: item.genres().to_vec(),
         tags: item.tags().to_vec(),
         collection_id: item.collection_id().map(|s| s.to_string()),
-        collection_name: None,
-        collection_type: None,
+        collection_name: item.collection_name().map(|s| s.to_string()),
+        collection_type: item.collection_type().map(|s| s.to_string()),
         thumbnail_url: item.thumbnail_url().map(|s| s.to_string()),
         synced_at: Some(now),
-        role: domain::MediaRole::default(),
+        role,
         chapters: item.chapters().to_vec(),
     })
 }
 
 struct SimpleSyncAdapter {
     library_command: Arc<dyn domain::ports::LibraryCommand>,
+    role_config: adapter_common::role_detector::RoleDetectionConfig,
 }
 
 impl SimpleSyncAdapter {
     fn new(library_command: Arc<dyn domain::ports::LibraryCommand>) -> Self {
-        Self { library_command }
+        Self {
+            library_command,
+            role_config: adapter_common::role_detector::RoleDetectionConfig::default(),
+        }
     }
 }
 
@@ -386,6 +396,7 @@ impl domain::ports::LibrarySyncAdapter for SimpleSyncAdapter {
         provider: &dyn IMediaProvider,
         provider_id: &str,
     ) -> domain::LibrarySyncResult {
+        use adapter_common::ffprobe;
         use std::time::Instant;
 
         let start = Instant::now();
@@ -426,11 +437,20 @@ impl domain::ports::LibrarySyncAdapter for SimpleSyncAdapter {
             return result;
         }
 
-        let library_items: Vec<domain::MediaItem> = items
+        let mut library_items: Vec<domain::MediaItem> = items
             .into_iter()
-            .map(|item| provider_item_to_library_item(item, provider_id))
+            .map(|item| provider_item_to_library_item(item, provider_id, &self.role_config))
             .collect();
 
+        for item in &mut library_items {
+            if ffprobe::should_probe_chapters(item.content_type(), item.duration_secs()) {
+                if let Ok(uri) = provider.get_source_uri(item.id()).await {
+                    let chapters = ffprobe::extract_chapters(&uri).await;
+                    item.set_chapters(chapters);
+                }
+            }
+        }
+
         if let Err(e) = self
             .library_command
             .upsert_items(provider_id, library_items)