First request takes 8 seconds (cold start)

1. Check the problem

Move heavy initialization into module scope so it caches across warm invocations. On Postgres, use a connection pooler like PgBouncer, direct connections cold-start slow. Trim dependencies too, bigger functions cold-start slower.

2. Use the prompt

My first request is slow because of a cold start. Stack: [Vercel functions / Supabase Postgres]. Help me move heavy initialization to module scope so it caches across warm invocations, add a connection pooler for the database, and trim function size. Show me the specific code to move.

3. Verify the fix

Review the proposed diff, run the relevant checks and exercise the original failing flow before merging.