test(procore): add pdf jwt dependency smoke

[mcxl]

• P2 fix(pims): whitelist + commit RPD_SSA_template.docx so route can find it #5: adds dependency smoke coverage for the pypdf and python-jose/cryptography upgrade risk.
• Generates tiny valid PDFs in memory, so no fixture files are added.
• Exercises document PDF extraction on a real text PDF when pypdf is installed.
• Exercises textless/scanned-style PDF fallback without a live OCR/network call.
• Exercises the Procore PDF green path without vision audit.
• Exercises real ES256 JWT encode/decode through core.auth.get_current_user using a generated JWKS.

Local tests:

• python -m pytest tests/test_dependency_smoke.py -v -> 1 passed, 3 skipped locally because this Python lacks pypdf
• flake8 tests/test_dependency_smoke.py -> clean
• direct bundled-runtime pypdf fixture validation -> text PDF extracted 3430 chars, textless PDF extracted empty text
• pre-push full suite -> passed

CI should run the PDF tests after installing requirements.txt with pypdf==6.13.0.

No production code changed.