chore: release ATS 4.2.0

[themariofrancia]

This pull request updates and improves several GitHub Actions workflow files for better consistency, maintainability, and reliability. The main changes include standardizing workflow names and file naming conventions, updating runner and action versions, improving branch handling logic, tightening workflow triggers, and adding timeouts for job reliability.

Workflow Standardization and Naming:

• Renamed workflow files and standardized their name fields to follow a consistent [FLOW] or [USER] prefix and numbering scheme. This improves clarity and organization in the Actions UI. [1] [2] [3]

Branch Handling and Comparison Improvements:

• Updated the changeset check workflow to dynamically use the PR's base branch for all comparisons (instead of hardcoding develop), ensuring correct detection of changesets regardless of the base branch. [1] [2]

Runner, Timeout, and Action Version Updates:

• Set explicit timeout-minutes for all jobs to prevent long-running or stuck workflows.
• Updated actions/checkout to v5.0.0 for all workflows, ensuring the latest features and security fixes. [1] [2] [3]
• Adjusted runner sizes where appropriate for efficiency. [1] [2] [3]

Workflow Logic and Trigger Improvements:

• Improved PR formatting workflow triggers to only include relevant PR events, reducing unnecessary workflow runs.
• Enhanced assignee check to properly handle and validate the presence of assignees using environment variables and improved Bash logic.
• Updated release summary steps in release workflows to use more robust Bash syntax and reference the correct publish workflow files. [1] [2] [3] [4] [5] [6]

Documentation and Clarity:

• Added or clarified comments throughout the workflows to explain logic and intent, especially around branch handling and workflow triggers. [1] [2]

These changes collectively make the CI/CD workflows more robust, easier to maintain, and less error-prone.

References:
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19]

[hedera-eng-infrastructure]

✅ Snyk checks have passed. No issues have been found so far.

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[gregscullard]

LGTM

[rbarker-dev]

For the workflow files that are numbered they should be incrementing.

{000,001,002,003}
{100,101,102,103}
{300,301}

This gives us an index that we can refer to them as as well as makes organizing by functionality a little easier.

[andrewb1269]

I left a couple of suggestions, but they are non-blocking for this review. Feel free to address them in a follow-on PR just to follow our standard best practices for formatting. Looks great!

[rbarker-dev]

Workflow content looks good. Just a comment (see earlier) on the workflow file names.

[themariofrancia]

Perfect. Noted—I'll apply these changes to develop