test: deflake recurring task test and fix tests hanging on Python 3.10

[vdusek]

Two ubuntu / Python 3.10 CI failures on master.

test_recurring_task.py::test_execution slept 200 ms and expected at least 3 calls at a 30 ms delay, but a slow runner got 1 (run). It now waits for the third call with a 5 s timeout and no longer needs run_alone.

A worker hung in a fixture teardown and the job ran until GitHub cancelled it after 6 hours (run). The cause is in backports.asyncio.runner, which pytest-asyncio uses on 3.10. Runner.run(coro, context=...) patches contextvars.copy_context process-wide while it creates the task, so the test server's thread can pick up the fixture's context. When both threads enter it at once, Context.run raises cannot enter context: ... is already entered, the task step is dropped, and the teardown waits forever. On Python 3.10, pytest-asyncio is pinned to 1.0.x, the last release before it started using the backports runner. That pin also brings in pytest 8, and ty can't type-check pytest.skip() with it, so the six runtime skips in the storage tests raise pytest.skip.Exception instead.

For any future hang, timeout_method = "thread" kills the stuck worker (the default signal method never fired in the 6 h run), and faulthandler_timeout = 600 dumps every thread's stack into the log. The job-level cap is in apify/workflows#333.

✍️ Drafted by Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 94.06%. Comparing base (fe97ee8) to head (6e5401e).
⚠️ Report is 6 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2287      +/-   ##
==========================================
- Coverage   94.12%   94.06%   -0.06%     
==========================================
  Files         183      183              
  Lines       13570    13570              
==========================================
- Hits        12773    12765       -8     
- Misses        797      805       +8     

Flag	Coverage Δ
unit	94.06% <ø> (-0.06%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[vdusek]

Let's just skip the problematic tests on 3.10 + Linux, since the failures are caused by an upstream issue, and we will drop 3.10 support soon anyway.

[Mantisus]

LGTM

[apify-approval-mirror]

Mirroring approval from @Mantisus.

[apify-approval-mirror]

Mirroring approval from @Mantisus.