feat(measurements): add total body water and bone mass types (#89)

- Adds TOTAL_BODY_WATER and BONE_MASS to MeasurementType enum
- Migration 0022 (purely additive ALTER TYPE ... ADD VALUE)
- Both stored canonically in kilograms (matches Withings hydration/bone mass measures and Health Connect TotalBodyWaterRecord/BoneMassRecord)
- Validation, formatters, i18n keys (en + de) for measurement form and doctor-report PDF
- Dashboard widgets registered (default-invisible, opt-in via settings)
- Withings client maps measure types 77 (hydration) and 88 (bone mass)
- Doctor report PDF includes both new types in vital-signs table when data exists

src/app/api/dashboard/widgets/route.ts

@@ -29,6 +29,8 @@ const widgetIdEnum = z.enum([
   "sleep",
   "steps",
   "glucose",
+  "totalBodyWater",
+  "boneMass",
   "bpInTarget",
 ]);