chore: migrate store to redb

server/src/state.rs

@@ -1,6 +1,6 @@
 use crate::models::*;
-use crate::store::{Store, read_json_file, write_json_atomic};
 use crate::search::MemoryIndex;
+use crate::store::{Store, read_json_file, write_json_atomic};
 use std::collections::{HashMap, HashSet};
 use std::fs;
 use std::path::PathBuf;
@@ -100,12 +100,15 @@ impl MemoryState {
         let mut session_graph = self.session_graph.write().unwrap();
         update_fn(&mut session_graph);
         let wal_path = self.base_dir.join("wal.jsonl");
-        if let Ok(payload) = serde_json::to_string(&*session_graph) {
-            if let Ok(mut file) = std::fs::OpenOptions::new().create(true).append(true).open(&wal_path) {
+        if let Ok(payload) = serde_json::to_string(&*session_graph)
+            && let Ok(mut file) = std::fs::OpenOptions::new()
+                .create(true)
+                .append(true)
+                .open(&wal_path)
+            {
                 use std::io::Write;
                 let _ = writeln!(file, "{}", payload);
             }
-        }
     }
     pub fn apply_sync_write<F: FnOnce(&mut KnowledgeGraph)>(&self, update_fn: F) {
         let lock_path = self.base_dir.join("master.lock");
@@ -142,7 +145,7 @@ impl MemoryState {
     pub fn rebuild_index(&self) {
         if let Ok(new_idx) = MemoryIndex::new() {
             let full = self.get_full_graph();
-            for (_, e) in &full.entities {
+            for e in full.entities.values() {
                 let _ = new_idx.index_entity(e);
             }
             for t in self.tasks.read() {
@@ -160,5 +163,3 @@ impl MemoryState {
         }
     }
 }
-
-