Filter exact music identities before lexical and semantic candidate limits

crates/searchi-service/src/lib.rs

@@ -513,7 +513,7 @@ impl HybridSearch {
             .lexical
             .search_with_options_traced(query, candidates, options, trace, parent)?;
         if query.trim().is_empty() || limit == 0 {
-            return Ok(Vec::new());
+            return Ok(lexical.into_iter().take(limit.min(1000)).collect());
         }
         trace.timed("hybrid.identifier_priority", parent, |_, _| {
             promote_identifiers(query.trim(), &mut lexical)
@@ -776,6 +776,24 @@ mod tests {
         let directory = tempfile::tempdir()?;
         let db = directory.path().join("index.db");
         let mut service = HybridSearch::with_provider(&db, Box::new(FailingProvider))?;
+        // The failure-only provider proves metadata-only searches never require inference.
+        let metadata = service.search_measured(
+            "",
+            5,
+            &SearchOptions {
+                media_artist: Some("Absent Artist".into()),
+                ..Default::default()
+            },
+            true,
+        )?;
+        assert!(metadata.results.is_empty());
+        assert!(!metadata
+            .metrics
+            .trace
+            .unwrap()
+            .iter()
+            .any(|span| span.name == "semantic.query_embedding"));
+
         let mut trace = TraceCollector::new(MetricsMode::Debug);
         assert!(service
             .search_traced(