refactor(sagemaker): extract SageMaker transport to separate package

[lukeocodes]

Summary

• Moves the SageMaker transport out of the SDK into the standalone deepgram-sagemaker package (v0.2.0 on PyPI)
• Updates README, changelog, and example to reference the external package (pip install deepgram-sagemaker)
• Removes the sagemaker extras group and AWS mypy overrides from pyproject.toml
• Cleans up unused imports (JSONDecodeError, websockets) flagged by ruff in socket clients
• Removes the changelog-log GitHub Actions workflow

Test plan

• Verify pip install deepgram-sagemaker installs v0.2.0 from PyPI
• Verify examples/27-transcription-live-sagemaker.py runs successfully with the external package
• Verify no remaining in-tree references to deepgram.transports.sagemaker
• Verify SDK builds cleanly without the removed AWS dependencies

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Refactors the SDK to remove the in-tree AWS SageMaker transport and instead document/use the external deepgram-sagemaker package, while also cleaning up a few unused imports and CI config.

Changes:

• Removed deepgram.transports.sagemaker and updated exports/docs/examples to use deepgram-sagemaker (deepgram_sagemaker import).
• Dropped AWS-related mypy overrides and cleaned unused imports in websocket socket clients.
• Removed the changelog-log GitHub Actions workflow and updated .fernignore comments accordingly.

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/deepgram/transports/sagemaker.py	Deletes the built-in SageMaker transport implementation.
src/deepgram/transports/init.py	Updates package docstring and removes SageMaker exports.
src/deepgram/speak/v1/socket_client.py	Removes unused imports flagged by ruff.
src/deepgram/listen/v2/socket_client.py	Removes unused imports flagged by ruff.
src/deepgram/listen/v1/socket_client.py	Removes unused imports flagged by ruff.
src/deepgram/agent/v1/socket_client.py	Removes unused imports flagged by ruff.
pyproject.toml	Removes AWS-related mypy overrides.
examples/27-transcription-live-sagemaker.py	Switches example to use deepgram_sagemaker.
README.md	Updates custom transport docs + SageMaker section to reference external package.
CHANGELOG.md	Updates SageMaker entry to reflect external package.
.github/workflows/changelog-log.yml	Removes changelog webhook workflow.
.fernignore	Updates comments describing ignored/generated files.

Comments suppressed due to low confidence (1)

README.md:406

• The SageMaker transport example snippet references EventType but doesn’t import it. Add the EventType import so the snippet runs when copied.

```python
from deepgram import AsyncDeepgramClient
from deepgram_sagemaker import SageMakerTransportFactory

factory = SageMakerTransportFactory(
    endpoint_name="my-deepgram-endpoint",
    region="us-west-2",
)

# SageMaker uses AWS credentials (not Deepgram API keys)
client = AsyncDeepgramClient(api_key="unused", transport_factory=factory)

async with client.listen.v1.connect(model="nova-3") as connection:
    connection.on(EventType.MESSAGE, on_message)
    await connection.start_listening()

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[Copilot]

In the async transport example, EventType is referenced but not imported in the snippet. This makes the example fail if copied as-is; add the EventType import (and keep the snippet self-contained).

[Copilot]

Pull request overview

Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.

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