ChalKak

Release and sync the `chalkak-ocr-models` AUR package by bumping `aur/chalkak-ocr-models/PKGBUILD` and `.SRCINFO`, refreshing checksums against the GitHub asset `ocr-models-vN`, and pushing packaging-only metadata to AUR. Use when publishing OCR model files to AUR, updating model package version/checksum, or fixing `chalkak-ocr-models` AUR metadata.

End-to-end Chalkak release orchestrator. Detects whether release is needed, builds English release notes from PR content, creates GitHub release first (to satisfy binary upload workflow), waits for release-binary success, and syncs all AUR packages (`chalkak`, `chalkak-bin`, `chalkak-ocr-models`) in one run.