Fires more concurrent ClaimAllocation calls than there is Ready
capacity at a real PostgreSQL instance and asserts: exactly as many
win as there was capacity, every winner gets a distinct server (no
double-booking), every loser gets ErrNoCapacity rather than a raw
serialization error or a hang, and the durable game_servers.state
count matches. This is the cross-allocator-replica race 8.30 calls
out as untested -- the existing capacity test in this file claims
strictly one request at a time. Verified clean across 6 runs with
-race, plus the full integration and unit suites.
Josh Creek
42ac34ca70