Add per-meal calorie cap (1000 kcal) + kcal/protein display

- SKILL.md RATIONAL PORTIONS: add ~1000 kcal/meal cap; trim starch/cheese/halloumi/lentil
  (not protein) if over; use scripts/calc_meal.py to check
- scripts/calc_meal.py: estimate protein/kcal/fibre/satfat for a meal's items, flag
  over_kcal (>1000) + per-item max_per_meal breaches (unit-aware); gates daily sends
- scripts/verify_portions.py: now also flags KCAL CAP violations via calc_meal
- references/calories.md: per-portion kcal/macro estimate table (source of truth)
- references/email-template.md + meal-history.md: show Est. kcal + Protein per card/entry
- daily cron prompt: compute + record kcal/protein_g on each entry, show kcal in email,
  enforce 1000 kcal cap before send (pushed via cronjob update)

scripts/verify_portions.py

@@ -121,6 +121,19 @@ def main():
                     f"{it['name']} {it['qty']} is >=70% of its cap and supplies "
                     f"{pg:.0f}/{total:.0f} g ({pg/total*100:.0f}%) of meal protein "
                     f"— not a balanced plate")
+        # 3) calorie cap check (uses calc_meal helper if available)
+        try:
+            import importlib.util
+            spec = importlib.util.spec_from_file_location(
+                "calc_meal", os.path.join(SKILL_DIR, "scripts", "calc_meal.py"))
+            cm = importlib.util.module_from_spec(spec); spec.loader.exec_module(cm)
+            res = cm.estimate(meal_items, inv)
+            if res["over_kcal"]:
+                violations.append(
+                    f"KCAL CAP {e['date']} {e['meal']} '{e['name']}': "
+                    f"~{res['kcal']:.0f} kcal exceeds 1000 kcal/meal")
+        except Exception:
+            pass
     if violations:
         print("FAIL: rational-portion violations:")
         for v in violations: