feat: add Bytescale image uploads

backend/prisma/migrations/20260414105925_news_media/migration.sql

@@ -0,0 +1,12 @@
+-- CreateTable
+CREATE TABLE "NewsImage" (
+    "id" SERIAL NOT NULL,
+    "url" TEXT NOT NULL,
+    "newsMediaId" INTEGER NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "NewsImage_pkey" PRIMARY KEY ("id")
+);
+
+-- AddForeignKey
+ALTER TABLE "NewsImage" ADD CONSTRAINT "NewsImage_newsMediaId_fkey" FOREIGN KEY ("newsMediaId") REFERENCES "NewsMedia"("id") ON DELETE CASCADE ON UPDATE CASCADE;