3136: Run llm code review

[f1sh1918]

Short Description

Proposed Changes

• copy get_access_token from lunes-app
• add llm-pr-review.py
• add llm-pr-review job and workflow in circle ci
  -add github workflow that triggers circle ci workflow on pr opened
• update docs

Side Effects

• N/A

Testing

• Please check the AI prompt for improvements
• Check pipeline and pr comment

Resolved Issues

Fixes: #3136

[deliverino]

LLM Review (verdigado-think)

CircleCI Configuration

The changes to .circleci/config.yml are accompanied by corresponding changes in .circleci/src/ (@common.yml, jobs/llm-pr-review.yml, and workflows/llm_review.yml), following the project's auto-generation pattern.

Commit Messages

The commit messages follow the project convention (<issue number>: <message>) and use the present tense.

Labels

The PR currently has no labels. Since these changes are restricted to CI/CD pipelines, scripts, and documentation and have no user-facing effect on the platform, the maintenance label should be added.

Security

• Secret Handling: The implementation correctly relies on environment variables and GitHub/CircleCI secrets (DELIVERINO_PRIVATE_KEY, CIRCLECI_API_TOKEN, NB_LLM_API_TOKEN) rather than hardcoding sensitive data.
• Permissions: The GitHub Action .github/workflows/llm-pr-review.yml explicitly sets permissions: {} to follow the principle of least privilege, as it only needs to trigger an external API call.