Keep logs for a set number of days

Logs grew forever. A daily prune-logs cron now deletes entries older
than the app setting logs_keep_days (Settings > General, super admin;
default AppData.LogsKeepDays, 90), with an index on logs.created_at.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/cron/index.ts

@@ -4,6 +4,7 @@ import pruneBotsQueue from "./prune-bots-queue";
 import cronClearJobSteps from "./clear-job-steps";
 import pruneBotHookEvents from "./prune-bot-hook-events";
 import cronPruneChatrooms from "./prune-chatrooms";
+import pruneLogs from "./prune-logs";
 import syncNotifyWatchers from "./sync-notify-watchers";
 import cronSyncHarnessModels from "./sync-harness-models";
 import syncComputers from "./sync-computers";
@@ -51,6 +52,12 @@ export default function cron() {
         task: cronPruneChatrooms,
     });
 
+    registerCronJob({
+        title: "prune-logs",
+        schedule: "@daily",
+        task: pruneLogs,
+    });
+
     registerCronJob({
         title: "sync-notify-watchers",
         schedule: "*/5 * * * *",