server/utils/files/index.js

It's great to see that you've added a normalizePath function to sanitize the file paths. However, it would be even better if you could also validate the file paths to ensure they are within the expected directory. This can help prevent directory traversal attacks where an attacker could potentially access sensitive files outside of the intended directory.
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    function validatePath(basePath, targetPath) {
      const resolvedPath = path.resolve(basePath, targetPath);
      if (resolvedPath.startsWith(basePath)) {
        return resolvedPath;
      }
      throw new Error('Invalid path');
    }

git fetch origin && git checkout -b ReviewBot/Impro-o6z4zej origin/ReviewBot/Impro-o6z4zej

Currently, you're using fs.readFileSync to read the file data. While this is fine for smaller files, it could potentially block the Node.js event loop if the file is large, leading to performance issues. Consider using fs.readFile instead, which is asynchronous and won't block the event loop.
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    fs.readFile(fullPath, "utf8", (err, data) => {
      if (err) throw err;
      return JSON.parse(data);
    });

git fetch origin && git checkout -b ReviewBot/Impro-7joft1h origin/ReviewBot/Impro-7joft1h