fix(doctor-report): name a managed record by its display name

The report cover, the PDF author field, the FHIR Patient and the share
page printed `fullName ?? username`, and the collector never read the
display name. A managed record has no way to get a full name, so its
generated `managed-<hex>` login landed on every clinical document made
for it; an own account printed the login instead of its display name.

The collector now resolves the name once (`patientName()`: full name,
display name, login, never a managed record's generated handle) and the
five readers print that one field. `patient.username` and
`patient.fullName` leave the report payload; nothing else read them.

src/app/c/[token]/__tests__/report-download.test.ts

@@ -97,7 +97,7 @@ function report(): DoctorReportData {
       end: "2026-01-31T00:00:00.000Z",
     },
     patient: {
-      username: null,
+      name: null,
       dateOfBirth: null,
       gender: null,
       heightCm: null,