- Batch screenshot endpoint: take 1-10 screenshots in a single request
- Concurrent processing with Promise.allSettled (partial success support)
- Upfront quota check for all URLs before processing
- Per-URL SSRF validation via existing takeScreenshot()
- Added incrementUsage() to usage middleware for granular tracking
- 10 new tests covering all edge cases
- Updated OpenAPI docs (JSDoc on route)
- Updated Node.js and Python SDK READMEs with batch method docs
