Deploy screenshots to Cloudflare R2 (litmus-v2g1)

End-to-end setup to serve screenshot images from Cloudflare R2 at screenshots.litmus.edger.dev. Includes bucket creation, custom domain, rclone-based upload sync, cache headers, and manifest deployment. Approach: local capture → rclone sync to R2 → served via custom domain with aggressive caching on images (immutable, 1yr) and short TTL (60s) on manifest.json.

Infrastructure Setup

• R2 Bucket: litmus-screenshots
• Endpoint URL: https://537f79be922377f50fb4ed655f6ab6b7.r2.cloudflarestorage.com/litmus-screenshots
• Account ID env var: CLOUDFLARE_APP_ID
• API Token env var: SCREENSHOTS_UPLOADING_API_TOKEN
• Target domain: https://screenshots.litmus.edger.dev

Summary of Changes

All 1560 screenshots (117.9 MiB) deployed to Cloudflare R2 and serving live at https://screenshots.litmus.edger.dev. Version bumped to 0.3.0.

What was done

• R2 bucket litmus-screenshots created with custom domain + CORS policy
• rclone added to devShell for checksum-based sync
• mise tasks: screenshots-sync (sync only) and screenshots-deploy (manifest + sync)
• Production manifest built and deployed
• Web app verified working end-to-end

Known issue

• Cloudflare cache rules showing cf-cache-status: DYNAMIC — may need zone-level investigation. Not blocking; content serves correctly.