refactor(scan): Implement KV-backed scan station submissions and response model

src/models/responses/ResponseScanIntake.ts

@@ -0,0 +1,30 @@
+import { IsBoolean, IsInt, IsNotEmpty, IsObject, IsString } from 'class-validator';
+
+/**
+ * Lightweight response returned to scan stations after a TrackScan submission.
+ * Contains only what the scan display needs — validity, lap time, and runner info.
+ * Full ResponseTrackScan is still returned to JWT-authenticated admin/UI callers.
+ */
+export class ResponseScanIntakeRunner {
+    @IsString()
+    @IsNotEmpty()
+    displayName: string;
+
+    @IsInt()
+    totalDistance: number;
+}
+
+export class ResponseScanIntake {
+    @IsBoolean()
+    accepted: boolean;
+
+    @IsBoolean()
+    valid: boolean;
+
+    @IsInt()
+    lapTime: number;
+
+    @IsObject()
+    @IsNotEmpty()
+    runner: ResponseScanIntakeRunner;
+}