Speed up fallback tests

[dgageot]

No description provided.

[dgageot]

@rumpl synctest.Test just for you

[docker-agent]

Code Review Summary

Reviewed the changes to speed up fallback tests by using testing/synctest.Test() with fake time instead of real time delays.

Changes Analyzed

• Added testing/synctest import
• Wrapped 7 test functions with synctest.Test(t, func(t *testing.T) {...})
• Removed t.Parallel() calls (synctest runs serially with deterministic scheduling)
• Removed elapsed time assertions (no longer needed with fake time)
• Replaced require.Eventually() with time.Sleep() + direct assertion in TestFallbackCooldownState

Verification

✅ All CI tests pass (test: SUCCESS)
✅ The use of synctest.Test() with streaming operations works correctly
✅ The fake clock properly synchronizes time.Sleep() and time.Now() calls
✅ The cooldown expiration logic works correctly with fake time

Findings

No issues found. The changes correctly implement test speedup using Go's testing/synctest package. The fake time scheduling is properly synchronized, and all tests pass.

Verdict: APPROVE ✓

[rumpl]

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