fix(ci): optimize regex parsing in PR review script

- Optimize regex execution loop by caching the test output string.
- Ensure `debug_regex.js` is removed.
- Verified local build and lint pass.

Co-authored-by: PR0M3TH3AN <[email protected]>

scripts/automated-pr-review.mjs

@@ -146,8 +146,9 @@ async function reviewPR(prNumber, baseRef) {
     // Extract failing test files
     const failingTests = [];
     const failureRegex = /✖\s+(tests\/[\w\-\.\/]+)\s+failed with exit code 1/g;
+    const testOutput = testRes.stdout + '\n' + testRes.stderr;
     let match;
-    while ((match = failureRegex.exec(testRes.stdout + '\n' + testRes.stderr)) !== null) {
+    while ((match = failureRegex.exec(testOutput)) !== null) {
         failingTests.push(match[1]);
     }