revert: restore original PythonBot workflow

[Abhijeet2409]

Summary

This PR reverts the PythonBot workflow failure notifier to its original
implementation to restore the previous stable behaviour.

Why

The updated workflow was failing when attempting to post PR comments.
Maintainers requested reverting the workflow to restore stability.

Testing

• Tested successfully in fork. Workflow runs correctly and follows expected behaviour.
• Workflow run: https://github.com/Abhijeet2409/hiero-sdk-python/actions/runs/22142733036/job/64011127278
• Test PR with bot comment: test: notifier bot workflow failure Abhijeet2409/hiero-sdk-python#5

Fixes #1825

[Abhijeet2409]

Hi @exploreriii 🙂
This PR restores the original workflow.
The previous revert PR was auto-closed as it wasn’t linked to an issue.
Would appreciate a review.

[coderabbitai]

Walkthrough

Deletes the Node.js workflow notifier and replaces it with inline Bash steps in the GitHub Actions workflow; updates workflow inputs, permissions, concurrency, and PR-resolution/posting logic; adds a CHANGELOG entry noting the revert.

Changes

Cohort / File(s)	Summary
Deleted notifier script .github/scripts/bot-workflows.js	Removed the entire Node.js-based workflow failure notifier (DRY_RUN, env validation, gh CLI wrappers, PR resolution, duplicate detection, and posting logic).
Workflow changes .github/workflows/bot-workflows.yml	Replaced script invocation with inline Bash to resolve PR via gh, check existing comments, and post an idempotent multi-line comment; removed workflow_dispatch inputs and DRY_RUN handling; changed pull-request permission to write and simplified concurrency/condition logic.
Changelog CHANGELOG.md	Added entry documenting revert to the previous PythonBot workflow behavior (PR #1825).

Sequence Diagram(s)

sequenceDiagram
    participant GHA as GitHub Actions<br/>Workflow
    participant GHCLI as GitHub CLI (gh)
    participant API as GitHub API

    GHA->>GHCLI: Determine PR for HEAD_BRANCH (gh pr list)
    GHCLI->>API: List PRs / query PRs
    API-->>GHCLI: PR number
    GHCLI-->>GHA: PR number

    GHA->>GHCLI: List comments on PR (gh pr view / gh api)
    GHCLI->>API: Get comments
    API-->>GHCLI: Comments list
    GHCLI-->>GHA: Comments data

    alt Identical comment exists
        GHA->>GHA: Skip posting (idempotent)
    else
        GHA->>GHCLI: Post comment on PR (gh api or gh pr comment)
        GHCLI->>API: Create comment
        API-->>GHCLI: Comment created
        GHCLI-->>GHA: Success
    end

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Estimated code review effort

🎯 4 (Complex) | ⏱️ ~45 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately and concisely summarizes the main change—reverting the PythonBot workflow to restore the original implementation, which is the core purpose of this PR.
Description check	✅ Passed	The description clearly explains why the revert was necessary (workflow failures when posting PR comments), what testing was performed (tested in fork with successful workflow runs), and references the linked issue (#1825).
Linked Issues check	✅ Passed	The PR directly addresses issue #1825 by reverting the PythonBot workflow to its original implementation, restoring stability after recent changes introduced failures.
Out of Scope Changes check	✅ Passed	All changes are directly related to reverting the workflow: deletion of the new bot-workflows.js script, simplification of the bot-workflows.yml workflow definition, and documentation of the revert in CHANGELOG.md.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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• Post copyable unit tests in a comment

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[coderabbitai]

Actionable comments posted: 5

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

@@           Coverage Diff           @@
##             main    #1826   +/-   ##
=======================================
  Coverage   93.29%   93.29%           
=======================================
  Files         141      141           
  Lines        9118     9118           
=======================================
  Hits         8507     8507           
  Misses        611      611           

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[exploreriii]

Thank you! @Abhijeet2409