Watch selected folders and reconcile bounded changes with media freshness guards

crates/searchi-service/src/media.rs

@@ -141,6 +141,11 @@ impl HybridSearch {
         task: &SourceTask,
         work: &mut BuildWork,
     ) -> Result<()> {
+        let change_revision = self.lexical.media_change_revision(
+            &path.to_string_lossy(),
+            identity.bytes,
+            identity.modified_ns,
+        )?;
         if let Some(count) = self
             .store
             .reuse_media_source(generation, task, id, identity)?
@@ -152,7 +157,7 @@ impl HybridSearch {
             if kind != MediaKind::Image {
                 // Metadata remains part of music search after path remapping.
                 let metadata = probe(tools, path, limits)?;
-                self.refresh_media_metadata(path, identity, &metadata)?;
+                self.refresh_media_metadata(path, identity, &metadata, change_revision)?;
             }
             identity.ensure_unchanged()?;
             work.report.chunks += count;
@@ -169,6 +174,7 @@ impl HybridSearch {
             tools,
             limits,
             identity,
+            change_revision,
             &mut work.report,
         )?;
         self.store
@@ -182,6 +188,7 @@ impl HybridSearch {
         path: &Path,
         identity: &MediaIdentity,
         metadata: &MediaProbe,
+        change_revision: i64,
     ) -> Result<()> {
         let tags = metadata
             .tags
@@ -189,12 +196,13 @@ impl HybridSearch {
             .map(|(k, v)| format!("{k}: {v}"))
             .collect::<Vec<_>>()
             .join("\n");
-        self.lexical.set_media_metadata(
+        self.lexical.set_media_metadata_at_revision(
             &path.to_string_lossy(),
             &tags,
             metadata.duration_ms,
             identity.bytes,
             identity.modified_ns,
+            change_revision,
         )
     }
 
@@ -208,6 +216,7 @@ impl HybridSearch {
         tools: &FfmpegTools,
         limits: &MediaLimits,
         identity: &MediaIdentity,
+        change_revision: i64,
         report: &mut EmbeddingReport,
     ) -> Result<()> {
         let mut ordinal = 0;
@@ -228,7 +237,7 @@ impl HybridSearch {
             report.chunks += 1;
         } else {
             let metadata = probe(tools, path, limits)?;
-            self.refresh_media_metadata(path, identity, &metadata)?;
+            self.refresh_media_metadata(path, identity, &metadata, change_revision)?;
             if metadata.has_video && kind == MediaKind::Video {
                 let mut seen = std::collections::HashSet::new();
                 let mut scenes = 0;