ci: fix PR title validation to enforce strict conventional commits format

Co-authored-by: cziter15 <[email protected]>

Author: Copilot

.github/workflows/validate-commits.yml

@@ -21,7 +21,9 @@ jobs:
           # Conventional commits regex pattern
           # Matches: type[(scope)][!]: description
           # Where type is one of: feat, fix, docs, style, refactor, perf, test, build, ci, chore, revert
-          PATTERN='^(feat|fix|docs|style|refactor|perf|test|build|ci|chore|revert)(\(.+\))?!?: .{1,}'
+          # Scope (optional) can contain: lowercase letters, numbers, hyphens, underscores, forward slashes
+          # Description must start with a lowercase letter
+          PATTERN='^(feat|fix|docs|style|refactor|perf|test|build|ci|chore|revert)(\([a-z0-9/_-]+\))?!?: [a-z].+'
           
           if [[ ! "$PR_TITLE" =~ $PATTERN ]]; then
             echo "================================================"