Prisma's pgbouncer=true on Supabase made every query 4 round-trips (postmortem)

Automated excerpt

Correcting one setting cut the availability check behind the booking page from 8. 06 seconds to 1. 88. With Prisma 5. 22 and pgbouncer=true against the transaction pooler, every query made four crossings of the 47 ms link. Across the 47 milliseconds between Helsinki and Dublin, the measured cost per query on the availability path came out between 210 and 260 milliseconds, on every query the application makes.

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