Pull the pure, testable logic out of the bake tasks into Pressa modules:
- Pressa::Drafts — slugs, ordinal dates, draft paths, and the new-draft template
- Pressa::Coverage — the coverage measurement script, output parsing, and baseline-ref resolution
- Pressa::Publish — the rsync command builder
Each gets its own tests, so this logic now sits under the lib/ coverage gate
instead of being untested glue inside the task files.
With the logic extracted, the namespaced bake/ split no longer earns its keep —
those files were mostly thin task declarations. Collapse build/draft/publish/quality
back into a single bake.rb with the original flat task names (new_draft, coverage,
publish_beta, and so on) and update CI and AGENTS.md to match.
