Fix event loop warnings

[dangusev]

• Removed "scheduled sleep took ..." warning. It doesn't belong there, and built-in asyncio debug mode is better suited for this
• Reduce the severity of "Audio buffer overflow" warning. It spams the logs too much.
• Fixed CancelledError propagation in NetworkMonitor

Summary by CodeRabbit

• Bug Fixes
  • Improved audio buffer handling and simplified timing mechanisms for better performance
  • Enhanced graceful shutdown behavior during network monitoring operations

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[coderabbitai]

📝 Walkthrough

Walkthrough

Two files receive focused refactoring: audio_track.py simplifies logging behavior and removes timing-tracking code while preserving pacing logic; network_monitor.py alters exception propagation by re-raising CancelledError instead of breaking the loop.

Changes

Cohort / File(s)	Summary
Audio Track Logging & Timing Simplification getstream/video/rtc/audio_track.py	Downgrade buffer overflow logging from warning to debug level; remove wakeup_time variable and associated timing calculations and delay reporting; pacing behavior maintained via existing sleep logic
Network Monitor Cancellation Behavior getstream/video/rtc/network_monitor.py	Propagate CancelledError by re-raising instead of breaking _monitor_loop, changing cancellation to propagate to caller rather than silently terminating loop

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Poem

🐰 Logs drift from warning down to whispers soft,
Timing calculations, cast adrift aloft,
When cancellation calls, we let it through—
Simpler code, cleaner flow, refreshed anew! ✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Title check	❓ Inconclusive	The title 'Fix event loop warnings' is vague and only partially related to the changeset. While the PR does address warnings, the title doesn't specify that it involves audio buffer overflow warnings, logging level changes, and CancelledError propagation fixes across multiple files.	Consider a more descriptive title like 'Reduce audio buffer warnings and fix event loop cancellation handling' to better convey the scope of changes.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

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✨ Finishing touches

• 📝 Generate docstrings

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