[Bug] PR quality-gates regex incorrectly patterns `fixe[sd]` — intent is unclear and fragile

[RUKAYAT-CODER]

Overview

.github/workflows/pr-quality-gates.yml line 23 contains a regex meant to match PR closing keywords (close, fix, resolve and their variants). The pattern fix(e[sd])? is confusing and diverges from standard GitHub closing keyword syntax. A simpler, explicit alternation removes ambiguity and ensures all documented variants are matched correctly.

Specifications

Features:

• PR body regex reliably matches all documented linking keywords: close, closes, closed, fix, fixed, fixes, resolve, resolves, resolved

Tasks:

• Replace the current regex with an explicit alternation: (close[sd]?|fix(ed|es)?|resolve[sd]?)\s+#\d+
• Add test cases validating each keyword variant against the pattern
• Document the expected keyword format in CONTRIBUTING.md

Impacted Files:

• .github/workflows/pr-quality-gates.yml
• CONTRIBUTING.md

Acceptance Criteria

• All nine documented closing keywords are matched correctly
• PRs without an issue reference are blocked
• PRs with any valid keyword + issue number pass the gate