expand BBQ theory knowledge graph

[StevenGGA]

What changed

• Expanded the encyclopedia from 38 to 520 contextual internal links.
• Added complete beef and pork primal maps plus detailed representative cut pages.
• Added lamb coverage, sausage science, fire/smoke/pit control, compound cooking strategies, and a seven-stage BBQ mastery path.
• Cross-linked cuts, mechanisms, ingredients, methods, safety, protocols, and experiments in the prose.
• Added validation rules that reject knowledge-island pages, broken links, and missing cross-domain coverage.
• Added USDA IMPS and FSIS sources for cut terminology and sausage safety.

Why

The first version relied too heavily on sidebar navigation. Readers could encounter a cooking method or mechanism in a cut page without a direct path to the relevant explanation. This change turns the site into a navigable knowledge graph aimed at systematic BBQ theory learning.

User impact

Readers can now move directly between a concrete cut, the science behind it, relevant ingredients, single or compound cooking methods, and safety or measurement guidance. Fish remains explicitly out of scope pending a separate aquatic-food science domain.

Validation

• ruff check .
• pytest -q — 15 passed
• python scripts/validate_content.py --strict
• Metric and generated-index checks
• mkdocs build --strict
• Playwright click-path checks for pork → smoking → fire/smoke → compound cooking and pork map → sausage science