feat: add debug logging to save_meta function

Co-authored-by: aider (openai/andrew/openrouter/qwen/qwen3-coder) <aider@aider.chat>

src/meta_plugin.rs

@@ -65,9 +65,11 @@ pub trait MetaPlugin {
     
     // Save metadata to database
     fn save_meta(&mut self, conn: &Connection, item_id: i64, value: String) -> Result<()> {
+        let meta_name = self.meta_name();
+        debug!("Saving metadata: item_id={}, name={}, value={}", item_id, meta_name, value);
         let meta = crate::db::Meta {
             id: item_id,
-            name: self.meta_name(),
+            name: meta_name,
             value,
         };
         crate::db::store_meta(conn, meta)?;