testTimeout, the limit on every read and wait in the ircserver tests,
goes from 5 to 30 seconds. A passing test never reaches it.
TestQuietClientNotAnsweringPingIsClosed uses a 4 second ping interval,
and measures its upper bound from the end of registration. The bound
leaves 2.7 seconds for scheduling delay, and is a second before the
close a two-interval read deadline would make. The lower bound, from
the client's last line, is unchanged.
The cancelled-query tests in internal/db run the endless query for 2
seconds instead of 100 ms. A context that ends before the statement
starts interrupts nothing, so the pool kept its connection.
Model: opus-5-5
sneak