Date-layout baseline remediation

• Normal focused runs compare Chikorita/Ditto LTR+RTL JSON coordinates, page counts, and PNG hashes against checked-in artifacts.
• All-template evidence asserts exact missingMarkers: [] for 14 templates and ['EXP_NO_PERIOD'] for Meowth, the documented blank-period exception.
• Raw PDFs are omitted; renderer CreationDate metadata made PDF bytes nondeterministic.
• Provenance is fixed to generation revision 58ee4eead7843105da20f8a177e7d250b24c3a87 and comparison ref 368858a56fc9c3152b540c39829908e2c3ea04c5.

Verification:

• Focused Vitest: pnpm exec vitest run src/templates/shared/date-layout.test.tsx — 1 file, 7 tests, twice with baseline comparison.
• PDF typecheck: pnpm --filter @reactive-resume/pdf run typecheck — pass.
• Targeted Biome: pnpm exec biome check packages/pdf/src/templates/shared/date-layout.test.tsx — pass.
• Boundaries: pnpm exec turbo boundaries — pass.
• Diff checks: git diff --check — pass.