refactor: simplify leader name parsing

[Aryaneefds]

Proposed change

Resolves #3095

Summary

This PR simplifies the regex in the get_leaders method to reduce its complexity score and satisfy SonarQube rule python:S5843.

Details

• Replaced the complex single regex pattern with two simpler re.findall patterns:
  • bracket_pattern: Handles bracket-style leaders like - [Name] or * [Name (Role)]
  • plain_pattern: Handles plain asterisk-style leaders like * Name
• Removed the unused itertools import that was only needed for the previous complex approach
• All existing test cases pass with identical output to the original implementation

This change is limited to regex refactoring and does not affect application behavior.

Checklist

• Required: I read and followed the contributing guidelines
• Required: I ran make check-test locally and all tests passed
• I used AI for guidance during investigation and verification, all changes were reviewed and applied manually

[coderabbitai]

Summary by CodeRabbit

• Bug Fixes
  • Improved leader information extraction to more reliably recognize names across common formatting patterns in documentation.
  • Enhanced name recognition to handle both bracket-style and standard list formats for better accuracy.
  • Simplified extraction behavior to reduce edge cases and ensure more consistent leader data across the system.

_{✏️ Tip: You can customize this high-level summary in your review settings.}

Walkthrough

Replaces complex nested regex in get_leaders with two simpler sequential patterns (bracket-style then asterisk-style) for extracting leader names from Markdown and removes the now-unused itertools import.

Changes

Cohort / File(s)	Summary
Leader Extraction Logic Refactoring backend/apps/owasp/models/common.py	Rewrote get_leaders to use two simpler regexes: first to match bracket-style bullets (e.g., - [Name] or * [Name (Role)]), then fallback to plain asterisk bullets (* Name). Removed prior itertools-based processing and deleted unused itertools import.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Possibly related PRs

• Fix regex for chapter leader #1118: Modifies the same leader-extraction logic in backend/apps/owasp/models/common.py with related regex changes.

Suggested reviewers

• kasya
• arkid15r

Pre-merge checks and finishing touches

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	Title clearly summarizes the main change: simplifying the leader name parsing regex in the get_leaders method, which directly matches the changeset.
Description check	✅ Passed	Description is comprehensive and directly related to the changeset, explaining the regex simplification, pattern changes, removed imports, and test verification.
Linked Issues check	✅ Passed	The PR addresses issue #3095 by replacing the complex regex with two simpler patterns to reduce SonarQube complexity score, achieving the stated objective of flattening the regex structure.
Out of Scope Changes check	✅ Passed	All changes are narrowly scoped to regex refactoring in get_leaders: replacing complex pattern with simpler alternatives and removing unused itertools import, with no behavioral changes.
Docstring Coverage	✅ Passed	Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%.

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment

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📜 Recent review details

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 549a834 and 4428c5d.

📒 Files selected for processing (1)

• backend/apps/owasp/models/common.py

🚧 Files skipped from review as they are similar to previous changes (1)

• backend/apps/owasp/models/common.py

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Aryaneefds]

@arkid15r @kasya can you review this PR.