The instantiation ctx timeout for postgres datastore is aggressive at…

… 5 seconds.

This causes intermittent initialisation failures in environments where the postgres is slow / remote etc.
Since this is an instantiation flow, its ok to increase the timeout to a higher number like 30 seconds.
This can avoid such failures.

internal/datastore/postgres/postgres.go

@@ -224,7 +224,7 @@ func newPostgresDatastore(
 			Msg("postgres configured to use intermediate migration phase")
 	}
 
-	initializationContext, cancelInit := context.WithTimeout(context.Background(), 5*time.Second)
+	initializationContext, cancelInit := context.WithTimeout(context.Background(), 30*time.Second)
 	defer cancelInit()
 
 	readPool, err := pgxpool.NewWithConfig(initializationContext, readPoolConfig)