Antigravity Google Script Data Harvester

I’m building a small “Antigravity” side-project that captures numerical data from the open web and from a few public APIs, funnels everything through Google Apps Script, and lands it neatly in a Google Sheet. The core idea is already sketched out, but I need a developer who can turn the sketch into a reliable, version-controlled workflow.

Here’s the flow I have in mind: Apps Script runs on a timed trigger, scrapes specific websites for fresh figures, hits selected endpoints for additional numbers, normalises the results, then appends or updates rows in the sheet. All code should sit in a GitHub repo so I can track commits and roll back if something breaks.

What I still need:
• A clean, well-commented Apps Script that handles both web scraping and API calls, with retry logic and basic rate-limit awareness.
• A lightweight configuration section (ideally JSON) so I can add or remove data sources without editing the main logic.
• Automatic sheet creation or header validation on first run.
• A simple GitHub Actions (or similar) setup to push any script changes back into my Apps Script project.

I don’t need dashboards or heavy analytics right now—just fast, accurate collection. If you’re comfortable with Apps Script, JavaScript scraping techniques, and GitHub workflows, let’s get this moving.