Generate code for the activity step and add it to samples.

[nick863]

Description

Please add an informative description that covers that changes made by the pull request and link all relevant issues.

If an SDK is being regenerated based on a new API spec, a link to the pull request containing these API spec changes should be included above.

All SDK Contribution checklist:

• The pull request does not introduce [breaking changes]
• CHANGELOG is updated for new features, bug fixes or other significant changes.
• I have read the contribution guidelines.

General Guidelines and Best Practices

• Title of the pull request is clear and informative.
• There are a small number of commits, each of which have an informative message. This means that previously merged commits do not appear in the history of the PR. For more information on cleaning up the commits in your PR, see this page.

Testing Guidelines

• Pull request includes test coverage for the included changes.

[Copilot]

Pull Request Overview

This pull request updates the Azure AI Agents SDK by regenerating code from a new API specification (commit hash updated from 511fb938 to 1197b127). The main purpose is to add support for the "activity step" functionality, which includes new models for MCP (Model Control Protocol) function parameters and run step activities. Additionally, the PR includes formatting fixes and parameter corrections across test files and samples.

Key Changes

• Added new activity-related models (ActivityFunctionDefinition, ActivityFunctionParameters, FunctionArgument, RunStepActivityDetails, RunStepDetailsActivity) for MCP tool support
• Updated error handling in operations to use HttpResponse objects instead of JSON directly
• Applied code formatting fixes and trailing comma corrections across test files and samples

Reviewed Changes

Copilot reviewed 18 out of 18 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
tsp-location.yaml	Updated API spec commit hash reference
_models.py	Added new activity and function parameter models for MCP support
_enums.py	Added ACTIVITIES enum value to RunStepType
_operations.py	Fixed error deserialization to use HttpResponse objects
model_base.py	Updated failsafe deserialization functions to handle HttpResponse
test files	Applied code formatting fixes and parameter corrections
sample files	Applied formatting improvements and added activity step handling
CHANGELOG.md	Added entry for new RunStepDetailsActivity feature

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[Copilot]

The docstring has a stray asterisk and period at the end. It should be: "Represents the list of activities associated with the given step."

Suggested change

	"""Represents the list of activities, associated with the given step.*.
	"""Represents the list of activities associated with the given step.

[github-actions]

API Change Check

APIView identified API level changes in this PR and created the following API reviews

azure-ai-agents