Watch upstream surya for PR #493 release; drop local patch when shipped #71

Context

PR #56 vendored datalab-to/surya#493 (Apple Silicon MPS `.max()` kernel crash fix) into `scripts/patches/` because no `surya-ocr` release shipped with the fix. As of writing, we're on `surya-ocr==0.17.1` and the latest published release is also 0.17.1. The fix sits unreleased upstream.

When upstream cuts a release that includes PR #493, our vendored patch becomes redundant tech debt.

Proposal

Quarterly check (or watch the PR for merge):

1. Check the latest released `surya-ocr` version on PyPI.
2. Diff against the patched function in our installed surya — if upstream now includes `safe_max_item` (or equivalent), the fix has shipped.
3. If shipped:
   • Bump `surya-ocr` pin in `pyproject.toml`.
   • `uv sync`.
   • Remove `scripts/patches/surya-mps-fix.patch`.
   • Remove `scripts/surya_mps_patch.py`.
   • Remove `patch-surya` justfile target.
   • Remove the documentation reference in CLAUDE.md / runbooks.
   • Open PR.

Acceptance criteria

• Check performed.
• If shipped: cleanup PR opened and merged.
• If not shipped: this issue stays open with a re-check date in ~3 months.

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