0.1.0-rc2

roc-pdf 0.1.0-rc2

This candidate closes Gate 4's production-visual compiler evidence and makes
the common authoring lifecycle more explicit.

Highlights:

• opaque Pdf.Prepared values with prepare-once buffered or chunked emission;
• complete 16-bit sRGB theme colors through the packaged profile and output
  intent;
• ergonomic 8-bit sRGB constructors and complete style, spacing, and margin
  theme setters;
• executable single-image figures using typed packed raster or validated JPEG
  sources, required alternative text, and optional visible captions;
• forward-compatible opaque vector/grouped drawings and content-first fixed
  pages;
• bounded InvalidDocument diagnostics with stable dotted feature codes for
  represented capabilities whose lowering is not executable yet;
• realistic runnable examples using the released basic-cli platform;
• generated public API documentation, checked for private-kernel leakage and
  published through GitHub Pages;
• refreshed capability and migration guidance.

Standard means the implemented deterministic PDF 2.0 subset. PDF/A-4 and
PDF/UA-2 are not claimed. Single-image figures are executable; broader drawing
composition and fixed pages reject atomically until their later contracts
close. Representability alone is not a capability claim.