Add agentic management SDK PR review workflow

[Yuchao Yan (msyyc)]

for #48444

Summary

• add a label-triggered agentic workflow for Python management SDK PR reviews
• apply the current MGMT SDK Code Review Rules from the repository default branch
• deterministically compare _metadata.json API versions at the first and latest PR commits
• post one self-updating advisory comment through safe outputs without checking out PR code

Validation

• compiled and schema-validated with gh aw compile mgmt-sdk-pr-review --validate
• verified the embedded drift checker against PR [AutoPR azure-mgmt-containerservice]-generated-from-SDK Generation - Python-6661182 (ONLY FOR TEST) #48445

[azure-pipelines]

Azure Pipelines:
Successfully started running 1 pipeline(s).
10 pipeline(s) were filtered out due to trigger conditions.
There may be pipelines that require an authorized user to comment /azp run to run.

[azure-pipelines]

Azure Pipelines:
Successfully started running 1 pipeline(s).
10 pipeline(s) were filtered out due to trigger conditions.
There may be pipelines that require an authorized user to comment /azp run to run.

[azure-pipelines]

Azure Pipelines:
Successfully started running 1 pipeline(s).
10 pipeline(s) were filtered out due to trigger conditions.
There may be pipelines that require an authorized user to comment /azp run to run.

[Copilot]

Pull request overview

Adds a label-triggered agentic workflow for management SDK PR reviews.

Changes:

• Collects management-package and API-version context.
• Applies current default-branch review rules.
• Generates the executable workflow lock file.

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated 2 comments.

File	Description
.github/workflows/mgmt-sdk-pr-review.md	Defines review logic and agent instructions.
.github/workflows/mgmt-sdk-pr-review.lock.yml	Compiled GitHub Actions workflow.

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[Copilot]

Pull request overview

Copilot reviewed 1 out of 2 changed files in this pull request and generated no new comments.

Suppressed comments (2)

.github/workflows/mgmt-sdk-pr-review.md:167

• /pulls/{number}/commits returns at most 250 commits, so on a larger PR this value is the 250th commit rather than the actual latest commit. The drift check and all subsequent review evidence would therefore be evaluated against stale state. Read the current PR's validated head.sha for latest_revision while retaining the commit list only to obtain the first revision, then regenerate the lock file.

      latest_revision = commit_shas[-1]

.github/workflows/mgmt-sdk-pr-review.md:157

• Renamed files are matched only by their new filename. GitHub exposes the old path as previous_filename, so renaming a management package to a path that no longer matches this pattern makes affectedPackages empty and the workflow incorrectly reports that the review is not applicable. Collect matches from both fields (and retain the previous path in changedFiles), then regenerate the lock file.

              for item in changed_files
              if isinstance(item.get("filename"), str)
              for match in [PACKAGE_PATTERN.match(item["filename"])]
              if match

[Copilot]

Pull request overview

Copilot reviewed 1 out of 2 changed files in this pull request and generated no new comments.