feat(cycle): import Apple Health reproductive data into cycle, add cycle export

Promote the reproductive HealthKit category types out of the
Apple-Health-import privacy-hold list and route them into cycle day-logs
instead of measurements, and surface cycle data on the three export
surfaces.

Import promotion:
- A new HealthKit -> cycle mapping module is the single source of truth for
  how MenstrualFlow, IntermenstrualBleeding, CervicalMucusQuality,
  OvulationTestResult, SexualActivity, PregnancyTestResult,
  ProgesteroneTestResult, Contraceptive and the symptom category types fold
  into CycleDayLog fields / seeded symptom keys. The XML importer
  accumulates same-day reproductive samples and writes one canonical
  day-log per day with source APPLE_HEALTH and a synthetic per-day
  externalId for idempotent re-import. The fold is gated on cycle tracking
  being enabled, so a non-cycle export never provisions cycle rows. A
  contraceptive method nudges the profile goal toward avoiding pregnancy
  only when the goal is still on its default. Basal body temperature stays
  a measurement and mirrors onto the day-log. Pregnancy/Lactation status
  and the pregnancy-bleeding types stay deferred; the cycle awareness types
  remain server-derived.

Export:
- FHIR emits LMP (LOINC 8665-2), average cycle length (64700-8), period
  length (64698-4) and the current phase as opt-in reproductive-health
  observations grouped into their own document section.
- The doctor PDF gains an opt-in cycle section (recent cycles, average
  length and variability, current phase), privacy-default off like mood.
- The full-backup export, the weekly backup worker and the off-host DR
  snapshot include the cycle tables, and the admin restore re-creates them;
  the day-log note round-trips as ciphertext and is never decrypted onto a
  report surface.

Mapping table documented in docs/api/cycle-healthkit-mapping.md. Adds unit
+ integration coverage for the mapping, the import routing, the FHIR
observations and the backup round-trip. OpenAPI regenerated. Six-locale
strings added.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/components/admin/backups-section.tsx

@@ -234,6 +234,8 @@ export function BackupsSection() {
           medications: number;
           intakeEvents: number;
           moodEntries: number;
+          cycles?: number;
+          cycleDayLogs?: number;
         };
       };
     },
@@ -242,7 +244,9 @@ export function BackupsSection() {
         data.summary.measurements +
         data.summary.medications +
         data.summary.intakeEvents +
-        data.summary.moodEntries;
+        data.summary.moodEntries +
+        (data.summary.cycles ?? 0) +
+        (data.summary.cycleDayLogs ?? 0);
       toast.success(
         t("admin.section.backups.uploadSuccess", { count: String(total) }),
       );