Add language options in AWS Transcribe STT Service

[kennethtegrado]

Changes

• Add language_options, identify_language, and identify_multiple_languages
• Update query params when creating signed_url
• Use LanguageCode as argument when creating TranscriptionFrame and InterimTranscriptionFrame

Ref #2847

[markbackman]

Move this utility function and the related ones outside of the class definition.

Nit: ideally, you could use the same utility function we have in other services. This helps with maintenance. Ex:
https://github.com/pipecat-ai/pipecat/blob/main/src/pipecat/services/elevenlabs/stt.py#L28-L150

[markbackman]

Can you also install the pre-commit hook to check for linting issues?

uv run pre-commit install

You can also run the fix-ruff.sh or pre-commit.sh scripts independent from the hook.

[codecov]

Codecov Report

❌ Patch coverage is 14.58333% with 82 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/pipecat/services/aws/utils.py	2.27%	43 Missing ⚠️
src/pipecat/services/aws/stt.py	25.00%	39 Missing ⚠️

Files with missing lines	Coverage Δ
src/pipecat/services/aws/stt.py	20.60% <25.00%> (+2.74%)	⬆️
src/pipecat/services/aws/utils.py	9.37% <2.27%> (-1.27%)	⬇️

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[kennethtegrado]

I'll update @markbackman based on your review thanks

[markbackman]

Also, can you please make only essential changes and stick to the current code structure as best as possible. This will help make code reviewing easier and will make maintenance easier as this service will align with other STT services.

[kennethtegrado]

Updated @markbackman and I tried to copy the code structure of other services as much as I can

[kennethtegrado]

Hi @markbackman any updates on this PR thank you!