fix(CI-CD): 🐛 Restrict release workflow to main branch only

Author: baxyz

.github/workflows/pr-validation.yml

@@ -150,7 +150,7 @@ jobs:
               }).join('\n');
 
               const header = `
-> ${avgStatus.icon} **Overall Coverage: ${avgCoverage}%** ${avgStatus.label === 'perfect' ? '— Target reached! 🎯' : `— Target: ${target}%`}
+> ${avgStatus.icon} **Overall Coverage: ${avgCoverage}%** ${avgStatus.label === 'perfect' ? '— Target reached! 🎯' : '— Target: ' + target + '%'}
 
 | | Metric | Progress | Coverage |
 |:---:|--------|:--------:|:--------:|

.github/workflows/release.yml

@@ -39,6 +39,10 @@ jobs:
             echo "::error::Release workflow can only be executed on helpers4/typescript"
             exit 1
           fi
+          if [ "${{ github.ref }}" != "refs/heads/main" ]; then
+            echo "::error::Release workflow can only be executed on main"
+            exit 1
+          fi
           echo "✅ Repository ownership verified"
 
   # Step 2: Lint