feat: add race cover image extraction

backend/src/routes/races.ts

@@ -1,6 +1,7 @@
 import { Router, Request, Response } from "express";
 import { pool } from "../db";
 import { rowToDto, bodyToColumns, RaceRow } from "../mappers/race";
+import { extractRaceCoverImage } from "../raceCoverImage";
 
 const router = Router();
 
@@ -117,7 +118,15 @@ router.post("/races", async (req: Request, res: Response) => {
     return;
   }
 
-  const { columns, values } = bodyToColumns(body);
+  const payload = { ...body };
+  const hasManualCover = typeof payload.coverImageUrl === "string" && payload.coverImageUrl.trim() !== "";
+  const hasOfficialUrl = typeof payload.officialUrl === "string" && payload.officialUrl.trim() !== "";
+
+  if (!hasManualCover && hasOfficialUrl) {
+    payload.coverImageUrl = await extractRaceCoverImage(payload.officialUrl);
+  }
+
+  const { columns, values } = bodyToColumns(payload);
   columns.unshift("id");
   values.unshift(body.id);