Relax protein to 1.7 g/kg; add rational-portion guard + weekly protein floor

- diet.protein_per_kg 2 -> 1.7 g/kg (evidence ceiling for trained/resistance-adapted adults)
  daily target 190-200 -> 165-175 g/day, ~80-90 g/meal
- weekly non-whey protein floor 1330 -> 1190 g (170 g/day x 7), still excl whey
- SKILL.md: RATIONAL PORTIONS hard rule (per-item max_per_meal caps, no single-ingredient
  overload, honest shortfall reporting); WEEKLY PROTEIN FLOOR (>=3 sources, none >50%)
- inventory.json: per-item max_per_meal caps + rational_portions defaults table
- scripts/verify_portions.py: regression probe for overload/cap violations
- README + references synced to 1.7 g/kg; .idea/.agentbridge gitignored

references/food-health.md

@@ -6,7 +6,7 @@ AARP / BodyLogic (men 40+); BBC Good Food & Berry Street (budget meals).
 General guidance, NOT medical advice — defer to the user's clinical/dietitian team.
 
 ## Healing & high-protein (burns recovery)
-- Protein at EVERY meal + snack. Target ~2 g/kg (user 95–100 kg → ~190–200 g/day).
+- Protein at EVERY meal + snack. Target ~1.7 g/kg (user 95–100 kg → ~165–175 g/day).
 - Best proteins (no red meat): eggs, poultry (chicken/turkey, skin off), fish &
   shellfish, dairy (milk/yogurt/cottage cheese/quark), tofu, tempeh, edamame,
   lentils, beans, peas, nuts, peanut butter, whey.