Optimize full graph rebuilds with batch indexing to prevent thread exhaustion, and fix adr/snippet search availability before restart

server/src/state.rs

@@ -58,39 +58,14 @@ impl MemoryState {
 
     pub async fn rebuild_index(&self) {
         if let Ok(new_idx) = MemoryIndex::new(&self.base_dir) {
-            let mut handles = Vec::new();
             
-            {
-                let graph = self.graph.read();
-                for e in graph.entities.values() {
-                    handles.push(new_idx.index_entity(e));
-                }
-            }
+            let entities = self.graph.read().entities.values().cloned().collect();
+            let tasks = self.tasks.read().clone();
+            let snippets = self.snippets.read().clone();
+            let adrs = self.adrs.read().clone();
 
-            {
-                let tasks = self.tasks.read();
-                for t in tasks {
-                    handles.push(new_idx.index_task(&t));
-                }
-            }
-            
-            {
-                let snippets = self.snippets.read();
-                for s in snippets {
-                    handles.push(new_idx.index_snippet(&s));
-                }
-            }
-            
-            {
-                let adrs = self.adrs.read();
-                for a in adrs {
-                    handles.push(new_idx.index_adr(&a));
-                }
-            }
-
-            for handle in handles {
-                let _ = handle.await;
-            }
+            let handle = new_idx.index_batch(entities, tasks, snippets, adrs);
+            let _ = handle.await;
 
             let _ = new_idx.commit().await;
             if let Ok(mut w) = self.search_index.write() {