chore: record database backfill worklog

.memory/worklog.json

@@ -1,12 +1,5 @@
 {
   "entries": [
-    {
-      "files_changed": 2,
-      "hash": "fae3fb3",
-      "message": "auto-save 2026-05-15 18:01 (~2)",
-      "ts": "2026-05-15T18:01:35+08:00",
-      "type": "commit"
-    },
     {
       "files_changed": 1,
       "message": "Codex 会话活跃 · 最近命令：codex · 1 项未提交变更 · 最近提交：auto-save 2026-05-15 18:01 (~2)",
@@ -3258,6 +3251,13 @@
       "message": "feat: add backend document database",
       "hash": "1ac9b1b",
       "files_changed": 4
+    },
+    {
+      "ts": "2026-05-18T15:40:58+08:00",
+      "type": "commit",
+      "message": "fix: backfill database on startup",
+      "hash": "c2e9558",
+      "files_changed": 1
     }
   ]
 }