Include PDF/A color profile in renderer image

[JustAGhosT]

CoilTrace production acceptance reached Mill but every certificate conversion returned success=false. The live revision and exact image digest were verified, and an in-container kpsewhich lookup confirmed that sRGB_IEC61966-2-1_black_scaled.icc is absent. pdfx requires that profile. Install Debian's icc-profiles package and change the Docker smoke test to compile an actual PDF/A-2b document, so this runtime dependency cannot pass image CI unchecked again.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

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Reviewing files that changed from the base of the PR and between c09e43b and d608851.

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🔇 Additional comments (1)

backend/Dockerfile (1)

15-15: 🗄️ Data Integrity & Integration

No change needed for ICC profile resolution.

icc-profiles-free does not contain the profile, but texlive-latex-extra provides it in TeX’s search path. The production renderer also invokes /usr/bin/pdflatex, so the smoke test exercises the same lookup mechanism. The repository does not require the profile at /usr/share/color/icc/....

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📝 Walkthrough

Summary by CodeRabbit

• Bug Fixes
  • Improved PDF/A-2b validation in the TeX smoke test.
  • Added support for ICC color profiles to improve PDF generation compatibility.

Walkthrough

The Docker image installs ICC profiles. The TeX smoke test now generates PDF/A-2b metadata with pdfx instead of loading hyperref directly.

Changes

PDF/A Smoke Test

Layer / File(s)	Summary
Image dependency and PDF/A smoke test backend/Dockerfile	The image installs icc-profiles-free. The TeX smoke test writes XMP metadata and validates PDF/A-2b output with pdfx.

Estimated code review effort: 1 (Trivial) | ~5 minutes

Merge Risk:⚪ Minimal · up to d6088

The Dockerfile change is localized to the renderer’s PDF/A dependency and smoke test, with no actionable merge-blocking risk remaining beyond normal checks and review.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the main change: adding the required PDF/A color profile to the renderer image.
Description check	✅ Passed	The description directly explains the missing ICC profile, the package installation, and the PDF/A-2b smoke-test update.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (1 skipped: 1 unsupported.)

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/pdfa-runtime-profile

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