BYOC: Longer byoc stream stop timeout

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What does this pull request do? Explain your changes. (required)

Want to extend default timeout on stop requests to 60 seconds to allow for cleanup.

In my video data app I have a number of LLM calls that would like to be able to have some time to wrap up to get all data.

May want to consider making this configurable in the future but 60 seconds seems reasonable and can always go much faster than that.

Specific updates (required)

• changes stop timeout from 10 seconds to 60 seconds
• updates tests to accomodate

How did you test each of these updates (required)

Does this pull request close any open issues?

Checklist:

• Read the contribution guide
• make runs successfully
• All tests in ./test.sh pass
• README and other documentation updated
• Pending changelog updated

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 32.24436%. Comparing base (1a26807) to head (9a2e95f).

Additional details and impacted files

@@              Coverage Diff              @@
##              master       #3861   +/-   ##
=============================================
  Coverage   32.24436%   32.24436%           
=============================================
  Files            169         169           
  Lines          41201       41201           
=============================================
  Hits           13285       13285           
  Misses         26915       26915           
  Partials        1001        1001           

Files with missing lines	Coverage Δ
byoc/stream_gateway.go	57.65379% <100.00000%> (ø)

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Files with missing lines	Coverage Δ
byoc/stream_gateway.go	57.65379% <100.00000%> (ø)

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[eliteprox]

LGTM as a quick solution. Extending the timeouts can cause to "stuck capacity", IIRC.

For the backlog, I'd recommend to send a control message with timeout and let the worker (pytrickle) cleanup frame_processor tasks async. Then, /stop can return immediately and the worker can signal to the gateway to close trickle channels.