refactor: optimize cron scheduling, DB maintenance, and TMDB reliability

- Skip recommendations refresh for titles fetched within the last 7 days via `getTitlesWithFreshRecommendations`; only stale titles are re-fetched
- Replace `Promise.allSettled` in `refreshTvChildren` with a `mapWithConcurrency` helper (concurrency = 5) to stay within TMDB's rate limit
- Add 30s request timeout middleware to TMDB client to prevent indefinitely hung fetches
- Expand `optimizeDb` weekly job to prune 30-day-old cron runs, integration events, expired sessions, and expired verifications
- Add `wal_checkpoint(TRUNCATE)` to `optimizeDatabase` so the WAL is flushed before `PRAGMA optimize`
- Add `recoverStaleImportJobs` called on server startup to mark any `pending`/`running` import jobs as errored after a crash/restart
- Return `false` from `triggerJob` immediately if the job is already running

docs/package.json

@@ -3,15 +3,15 @@
   "version": "0.0.0",
   "private": true,
   "scripts": {
-    "build": "next build",
-    "dev": "next dev",
-    "start": "next start",
+    "build": "bun --bun next build",
+    "dev": "bun --bun next dev",
+    "start": "bun --bun next start",
     "lint": "oxlint",
     "format": "oxfmt",
     "format:check": "oxfmt --check",
-    "check-types": "fumadocs-mdx && next typegen && tsc --noEmit",
+    "check-types": "bun --bun fumadocs-mdx && bun --bun next typegen && tsc --noEmit",
     "generate:api-docs": "bun scripts/generate-api-docs.ts",
-    "postinstall": "fumadocs-mdx"
+    "postinstall": "bun --bun fumadocs-mdx"
   },
   "dependencies": {
     "@takumi-rs/image-response": "^0.73.1",