RC: Supported regions automation

[cmilesb]

I used Augment to write a script and Github workflow to check the Redis Cloud API for changes to the supported regions table. This workflow checks for new regions or new supported regions for Essentials and Pro in Redis Cloud and updates a JSON file. A shortcode reads the JSON file to generate the tables automatically. If anything's changed, it'll open a PR - whoever is in charge of cloud (assuming me) will have to add location and area data manually, but support for Essentials/Pro should be updated automatically.

Before merge, we need to add a Redis Cloud API key and secret key to our secrets. I made one to connect to the Product account that's labeled docs-region-sync-api-key, but maybe there's an easier or more secure way that I'm missing.

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Note

Medium Risk
Introduces a scheduled GitHub Action that uses Redis Cloud API credentials to auto-update docs data and open PRs, which could create noisy or incorrect updates if the API/schema or secrets are misconfigured. Also changes how the supported regions page is rendered by moving from hardcoded tables to JSON-driven shortcodes.

Overview
Adds automation for Redis Cloud supported regions: a new scheduled/manual GitHub Actions workflow runs build/rc_supported_regions_sync.py, commits changes to data/rc_supported_regions.json, pushes to a dedicated branch, and opens a PR when region support changes.

Replaces the large, hardcoded region tables in supported-regions.md with a new rc-supported-regions shortcode that renders AWS/GCP tabbed tables and an Azure table from the JSON dataset.

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[github-actions]

Staging links:
https://redis.io/docs/staging/test-supported-region-automation/operate/rc/supported-regions/

[jit-ci]

🛡️ Jit Security Scan Results

✅ No security findings were detected in this PR

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[cursor]

Cursor Bugbot has reviewed your changes and found 2 potential issues.

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[kaitlynmichael]

LGTM