feat(vaccinations): carry the immunization log through export and restore

- a new backup section reads the dose and its document link through
  their own delegates and writes both ends in one file, the arrangement
  the visit section already uses
- the practitioner and the visit remap to the rows the same restore put
  back; the booster reminder never travels, so its reference resolves to
  null and the drop is reported rather than swallowed
- the antigen slug restores verbatim: a slug the catalogue has since
  dropped still says what a person was given
- the round trip seeds a dose with every optional column filled and
  reads each one back, so a returning row count cannot stand in for a
  returning record

src/app/api/admin/backups/[id]/restore/__tests__/round-trip.test.ts

@@ -290,6 +290,8 @@ function sourceClient() {
     encounterDocumentLink: { findMany: vi.fn().mockResolvedValue([]) },
     encounterLabLink: { findMany: vi.fn().mockResolvedValue([]) },
     encounterConditionLink: { findMany: vi.fn().mockResolvedValue([]) },
+    vaccinationRecord: { findMany: vi.fn().mockResolvedValue([]) },
+    vaccinationDocumentLink: { findMany: vi.fn().mockResolvedValue([]) },
     customMetric: {
       findMany: vi.fn().mockResolvedValue([
         {

src/app/api/admin/backups/[id]/restore/route.ts

@@ -49,6 +49,7 @@ import { restoreProfileData } from "@/lib/export/profile-backup";
 import { restoreIntradayProfileData } from "@/lib/export/intraday-profile-backup";
 import { restoreHealthScoreData } from "@/lib/export/health-score-backup";
 import { restoreVisitsData } from "@/lib/export/visits-backup";
+import { restoreVaccinationsData } from "@/lib/export/vaccinations-backup";
 import { invalidateUserData } from "@/lib/cache/invalidate";
 
 export const dynamic = "force-dynamic";
@@ -92,6 +93,8 @@ interface RestoreResponse {
     practitioners: number;
     encounters: number;
     encounterLinks: number;
+    vaccinations: number;
+    vaccinationLinks: number;
   };
 }
 
@@ -1332,6 +1335,18 @@ const handler = apiHandler(
             skips,
           );
 
+          // The immunization log, after the visits: a dose remaps its
+          // practitioner and its encounter against rows the branch above has
+          // just written, and its document link needs the documents that
+          // landed before that. Both ends of this section live in
+          // `src/lib/export/vaccinations-backup.ts`.
+          const vaccinationsCleared = await restoreVaccinationsData(
+            tx,
+            ownerId,
+            payload,
+            skips,
+          );
+
           const cleared = {
             measurements: measurements.count,
             medications: meds.count,
@@ -1361,6 +1376,8 @@ const handler = apiHandler(
             practitioners: visitsCleared.practitioners,
             encounters: visitsCleared.encounters,
             encounterLinks: visitsCleared.encounterLinks,
+            vaccinations: vaccinationsCleared.vaccinations,
+            vaccinationLinks: vaccinationsCleared.vaccinationLinks,
           };
           return { cleared, skipped: summarizeRestoreSkips(skips) };
         },