chore(tests): clean leftover test state on shared CI app

[nijeesh-stream]

Summary

Three test classes routinely fail on CI because the shared test app accumulates state across runs whenever a prior PR's job died before its inline teardown could fire. None of these are SDK behavior bugs — they are infra/seeding gaps that surface as red CI on unrelated PRs.

ChannelTypeTest / CommandTest — 50-item quota

Both classes tear down their state inline at the end of each test. When a CI run dies mid-test before the delete(...) call fires, the leftover entry stays on the shared test app. Once enough zombies accumulate, every new run hits the per-app cap (CustomChannelTypeLimit = 50, CustomCommandLimit = 50 on the backend):

StreamException: CreateChannelType failed with error:
    "your application reached the maximum number of custom channel types (50)"
StreamException: CreateCommand failed with error:
    "your application reached the maximum number of custom commands (50)"

Blocks 17 tests across the two classes. Add a @BeforeAll sweep on each that lists, filters out system defaults, and best-effort deletes the rest.

UserTest — paginated queryBanned misses new ban

Several ban-related tests do User.ban().request() then User.queryBanned().request() and assert the new ban is in the response with assertTrue(bans.stream().anyMatch(...)). queryBanned returns a paginated slice. Once enough zombie bans accumulate on the shared app the just-created ban ends up past page 1 and the assertion fails with expected: <true> but was: <false>.

Fix: @BeforeAll cleanupLeftoverBans that pages through and best-effort unbans each. Affects 5 tests (Can ban user, Can ban user with delete reactions, Can shadow ban user, Can list banned user, Can unban user).

TaskStatusTest — default waitFor too short for deleteMany

Channel.deleteMany(...).request().getTaskId() and then poll TaskStatus.get(taskId) for completion. The default waitFor timeout (5s, defined on BasicTest) is routinely too short for the asynq queue under load. Bump that one test to 5 minutes.

All sweeps are best-effort: anything still in active use returns an error from delete() / unban() and is skipped.

Test plan

• ./gradlew spotlessCheck compileTestJava — clean
• CI green on ChannelTypeTest + CommandTest + UserTest + TaskStatusTest