PR #991 - Cap-go/website

Supersedes #879 — rebased onto current main with merge conflicts resolved and richer episode descriptions.

Summary

Generate two-voice podcast episodes from eligible English blog posts via AutoContent API (https://api.autocontentapi.com).
Expose episodes on matching blog pages with an accessible native audio player, Open Graph audio metadata, and JSON-LD (PodcastEpisode + AudioObject).
Publish a site-owned RSS feed at /podcast.xml with valid enclosures, stable GUIDs, artwork, and canonical article links.
Make the feed discoverable via a global RSS alternate link and robots.txt sitemap entry.
Add GitHub Actions workflow for new posts, daily quota-aware backfill (2 oldest missing), and manual --slug runs.

Episode descriptions now include:

The source article URL
Up to 3 related Capgo blog posts (matched by shared tags)
Up to 3 Capgo product/docs links (matched by tags/keywords, e.g. /live-update/, /docs/plugins/updater/, /plugins/)

Automation is off by default. Set these in GitHub repository settings:

Type	Name	Purpose
Variable	`PODCAST_AUTOMATION_ENABLED`	Set to `true` to enable workflows
Variable (optional)	`PODCAST_SITE_URL`	Defaults to `https://capgo.app`
Secret	`AUTOCONTENT_API_KEY`	AutoContent API bearer token
Secret	`AUTOCONTENT_PODCAST_SHOW_ID`	Target podcast show ID
Secret	`AUTOCONTENT_PODCAST_VOICE_1`	First voice ID (integer)
Secret	`AUTOCONTENT_PODCAST_VOICE_2`	Second voice ID (integer)

Optional env overrides for local/manual runs: AUTOCONTENT_API_BASE_URL, PODCAST_POLL_INTERVAL_MS, PODCAST_POLL_TIMEOUT_MS.

.github/workflows/generate-podcast.yml — push on new EN blog posts, daily cron backfill, workflow_dispatch
Outrank import workflow also generates one episode per import batch when enabled

bun test scripts/blogs/generate-podcast.test.ts scripts/blogs/podcast-discovery.test.ts
bun run ci:verify:web

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