test(server): assert the row exists before checking its stamped columns

findRow returns null for a missing row, and `row?.deleted_at` is then
undefined, which `.not.toBeNull()` accepts. The converted soft delete,
album sync and passkey counter checks would therefore pass if the row were
removed outright. They now assert the row is there first, as the raw
`.get()` reads they replace did by throwing on a missing row.

server/tests/unit/nest/files.service.test.ts

@@ -460,7 +460,9 @@ describe('toggleStarred / softDeleteFile / restoreFile', () => {
     const file = await makeFile(trip.id, user.id);
     await svc.softDeleteFile(file.id);
     const row = await findRow(orm, TripFiles, { id: file.id });
-    expect(row?.deleted_at).not.toBeNull();
+    // The row must still be there: a hard delete would leave findRow at null.
+    expect(row).not.toBeNull();
+    expect(row!.deleted_at).not.toBeNull();
   });
 
   it('FILE-SVC-021: restoreFile clears deleted_at and returns the formatted row', async () => {

server/tests/unit/nest/memories-access.service.test.ts

@@ -691,7 +691,8 @@ describe('updateSyncTimeForAlbumLink (MA9)', () => {
     await access.updateSyncTimeForAlbumLink(String(linkId));
 
     const row = await findRow(orm, TripAlbumLinks, { id: linkId });
-    expect(row?.last_synced_at).not.toBeNull();
+    expect(row).not.toBeNull();
+    expect(row!.last_synced_at).not.toBeNull();
   });
 
   it('MEMACCESS-MA9-002: a non-canonical id is a silent no-op, matching a legacy UPDATE that matched zero rows', async () => {

server/tests/unit/nest/passkey.service.test.ts

@@ -666,8 +666,9 @@ describe('passkeyLoginVerify', () => {
     expect(decoded).toHaveProperty('pv');
 
     const credRow = (await findRow(orm, WebauthnCredentials, { id: cred.id }));
-    expect(credRow?.counter).toBe(6);
+    expect(credRow).not.toBeNull();
-    expect(credRow?.last_used_at).not.toBeNull();
+    expect(credRow!.counter).toBe(6);
+    expect(credRow!.last_used_at).not.toBeNull();
     const userRow = await readUser(orm, user.id);
     expect(userRow.last_login).not.toBeNull();
     expect(userRow.login_count).toBe(1);