new raceday and backup

tests/server_persistence.integration.test.js

@@ -160,6 +160,24 @@ test("SQLite API persists state, passings, and overlay session results", { timeo
     assert.equal(savePayload.ok, true);
     assert.equal(typeof savePayload.updatedAt, "string");
 
+    const backupResponse = await fetch(`${baseUrl}/api/backups`, {
+      method: "POST",
+      headers: { "Content-Type": "application/json" },
+      body: JSON.stringify({ reason: "pre_start", sessionId: "session_1", eventId: "event_1" }),
+    });
+    const backupPayload = await backupResponse.json();
+    assert.equal(backupResponse.status, 201);
+    assert.equal(backupPayload.ok, true);
+    assert.equal(backupPayload.backup.reason, "pre_start");
+    assert.equal(backupPayload.backup.sessionId, "session_1");
+    assert.ok(backupPayload.backup.sizeBytes > 0);
+
+    const backupsResponse = await fetch(`${baseUrl}/api/backups`);
+    const backupsPayload = await backupsResponse.json();
+    assert.equal(backupsResponse.status, 200);
+    assert.equal(backupsPayload.backups.length, 1);
+    assert.equal(backupsPayload.backups[0].fileName, backupPayload.backup.fileName);
+
     const storedResponse = await fetch(`${baseUrl}/api/state`);
     const storedPayload = await storedResponse.json();
     assert.deepEqual(storedPayload.state, initialState);