fix(measurements): wire the six deferred Apple Health identifiers

Adds RESPIRATORY_RATE, BODY_MASS_INDEX, and the four remaining
deferred quantity types to MeasurementType plus the Apple Health
mapping. The batch route already returns 200 with a per-entry skip
for unmappable identifiers; iOS reads that as success and advances
its sync anchor, so any sample with one of these identifiers used
to be dropped forever. The mapping now accepts them and the rows
land.

The walking-asymmetry and walking-double-support percent values
adopt the project's server-side scaling convention (raw HK reading
on the wire, server applies the ×100 at ingest), matching the
walking-steadiness path. iOS releases that still send the
pre-multiplied percent need a one-release shim and are tracked in
the iOS coord notes.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/lib/validations/measurement.ts

@@ -35,6 +35,13 @@ export const measurementTypeEnum = z.enum([
   // ── v1.4.30 R-F T1.4 + T1.5 ──
   "WALKING_STEADINESS",
   "AUDIO_EXPOSURE_EVENT",
+  // ── v1.5.5 iOS-coord — six previously-deferred HK identifiers wired end-to-end ──
+  "RESPIRATORY_RATE",
+  "BODY_MASS_INDEX",
+  "LEAN_BODY_MASS",
+  "WALKING_HEART_RATE_AVERAGE",
+  "WALKING_ASYMMETRY",
+  "WALKING_DOUBLE_SUPPORT",
 ]);
 
 export const glucoseContextEnum = z.enum([
@@ -97,6 +104,23 @@ const unitMap: Record<string, string> = {
   // 0–1440 covers the 24-hour day; in practice indoor users sit near 0
   // and outdoor athletes accumulate a few hours.
   TIME_IN_DAYLIGHT: "minutes",
+  // ── v1.5.5 iOS-coord additions ──
+  // Respiratory rate breaths-per-minute — the HK identifier ships as
+  // `count/min`; we keep the more conventional clinical label.
+  RESPIRATORY_RATE: "breaths/min",
+  // BMI kg/m² — HealthKit ships the unitless ratio; the canonical
+  // display string mirrors clinical convention.
+  BODY_MASS_INDEX: "kg/m²",
+  // Lean body mass kg — body-composition partner to FAT_MASS.
+  LEAN_BODY_MASS: "kg",
+  // Walking heart rate average bpm — daily rollup; distinct from
+  // RESTING_HEART_RATE (sleep-window minimum) and spot PULSE.
+  WALKING_HEART_RATE_AVERAGE: "bpm",
+  // Walking gait percent (0-100 after server-side ×100 scaling).
+  // Same convention as WALKING_STEADINESS / BODY_FAT / OXYGEN_SATURATION
+  // — see the project convention block in `apple-health-mapping.ts`.
+  WALKING_ASYMMETRY: "%",
+  WALKING_DOUBLE_SUPPORT: "%",
 };
 
 export function getUnitForType(type: string): string {
@@ -176,6 +200,24 @@ const VALUE_RANGES: Record<string, { min: number; max: number }> = {
   // Time in daylight (minutes/day) — full 24-hour window. Outdoor work
   // tops the range; sedentary indoor days sit near 0.
   TIME_IN_DAYLIGHT: { min: 0, max: 1440 },
+  // ── v1.5.5 iOS-coord additions ──
+  // Respiratory rate breaths/min — adult range ~12-20 at rest; severe
+  // distress can spike past 40; bradypnea floor ~4. Generous bounds.
+  RESPIRATORY_RATE: { min: 3, max: 60 },
+  // BMI kg/m² — sub-12 is starvation-class, 70 covers extreme obesity.
+  // Outside the band is almost certainly a height-or-weight typo.
+  BODY_MASS_INDEX: { min: 8, max: 70 },
+  // Lean body mass kg — adult plausibility, ~25 kg (small adult) to
+  // 150 kg (extreme lean athlete). Same shape as FAT_FREE_MASS.
+  LEAN_BODY_MASS: { min: 10, max: 250 },
+  // Walking heart rate average bpm — endurance athletes can sit in
+  // the high 70s while walking; ailing or post-stimulant readings can
+  // touch 200. Same upper bound as the spot PULSE / RESTING_HEART_RATE.
+  WALKING_HEART_RATE_AVERAGE: { min: 30, max: 220 },
+  // Gait percent (0-100). Apple ships these as 0..1 fractions; after
+  // the ×100 server-side scaling the canonical band is 0..100.
+  WALKING_ASYMMETRY: { min: 0, max: 100 },
+  WALKING_DOUBLE_SUPPORT: { min: 0, max: 100 },
 };
 
 export function validateMeasurementRange(