Add request and database query timeouts

[VaibhavAcharya]

GoTrue currently has no timeout configuration at multiple levels:

• HTTP server: http.Server in api.go has no ReadTimeout, WriteTimeout, or IdleTimeout
• Database queries: storage/dial.go creates a plain pop.Connection with no timeout. No context.WithTimeout is used in the storage layer.
• MySQL max_execution_time: Not configured, meaning long-running SELECT queries have no server-side limit.

Without these, a slow query or hung connection can cascade and degrade the entire service.

Moved from CI 29, 30, 31