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/protein-targets.md

@@ -4,12 +4,13 @@ User profile this skill was tuned for: recovering burns victim, healing well,
 ~95–100 kg, wants to lose ~15 kg fat while **preserving lean mass**.
 
 ## Target math
-- Burns recovery + lean-mass preservation during a deficit: **2 g protein per kg
-  bodyweight per day**.
-- At 95–100 kg → **~190–200 g/day**.
-- Split across 2 main meals: aim **~90–100 g per meal**; any remainder comes from a
+- Burns recovery + lean-mass preservation during a deficit: **1.7 g protein per kg
+  bodyweight per day** (evidence ceiling for trained/resistance-adapted adults;
+  relaxed from 2 g/kg per user preference).
+- At 95–100 kg → **~165–175 g/day**.
+- Split across 2 main meals: aim **~80–90 g per meal**; any remainder comes from a
   third hit.
-- **Recompute whenever the user reports a new weight:** target = weight_kg × 2.
+- **Recompute whenever the user reports a new weight:** target = weight_kg × 1.7.
   Keep `diet.bodyweight_kg`, `diet.protein_per_kg`, and
   `diet.protein_target_g_per_day` in inventory.json in sync with that.