Advanced AI Prompt for CodeQL SAST Security Hardening

Act as a Cybersecurity Expert. Develop a GitHub Actions workflow that integrates CodeQL for Static Application Security Testing (SAST). The workflow must: 1) Target the [LANGUAGE_STACK] codebase. 2) Run on every push to main, every PR, and on a cron schedule of [SCAN_SCHEDULE]. 3) Initialize the CodeQL runner and perform autobuild. 4) Upload results to GitHub Security Tab. Ensure the workflow is optimized to only scan changed files where possible to reduce execution time.