chore: regenerate bindings and the traceability matrix

bindings.ts picks up the library-exclusion commands and types from tauri-specta.
The matrix regenerates because validation.ts and its test are gone — the doc
link checker caught the stale references, which is the first time that gate has
paid for itself on a generated artifact rather than a hand-written link.

Also drops exclusions::is_excluded: a wrapper over is_excluded_by that only a
test called, while the trait impls hoist the snapshot themselves. The test now
calls the same path production does.

src-tauri/src/commands/library.rs

@@ -279,7 +279,10 @@ mod tests {
         };
 
         let json = serde_json::to_string(&settings).expect("serialises");
-        assert!(json.contains("\"excludedItemIds\""), "camelCase on the wire");
+        assert!(
+            json.contains("\"excludedItemIds\""),
+            "camelCase on the wire"
+        );
 
         let parsed: LibrarySettings = serde_json::from_str(&json).expect("parses back");
         assert_eq!(parsed, settings);

src-tauri/src/repository/exclusions.rs

@@ -113,13 +113,6 @@ pub fn is_excluded_by(excluded: &HashSet<String>, item: &MediaItem) -> bool {
         }
 }
 
-/// Whether the currently-configured exclusions hide `item`.
-///
-/// TRACES: UR-076 | DR-209
-pub fn is_excluded(item: &MediaItem) -> bool {
-    is_excluded_by(&excluded_snapshot(), item)
-}
-
 /// Drop the user's hidden items from a repository result.
 ///
 /// Implemented as a trait so the hybrid repository's generic result helpers —
@@ -326,7 +319,7 @@ mod tests {
         let _guard = EXCLUSION_TEST_LOCK.lock_safe();
         set_excluded_item_ids(&["hidden".to_string()]);
 
-        let still_matches = is_excluded(&item("hidden"));
+        let still_matches = is_excluded_by(&excluded_snapshot(), &item("hidden"));
         let survives = item("hidden").without_excluded();
 
         set_excluded_item_ids(&[]);