chore: remove código morto e padroniza scripts e CI

server/src/index.ts

@@ -51,16 +51,6 @@ app.get("/health", async () => {
   return { status: "ok" };
 });
 
-const streamQuerySchema = z.object({
-  url: z.string().url("URL inválida").startsWith("http", "Apenas HTTP/HTTPS permitidos"),
-  // Offset opcional em bytes para retomar download.
-  offset: z
-    .string()
-    .regex(/^\d+$/)
-    .transform((value) => Number.parseInt(value, 10))
-    .optional(),
-});
-
 const downloadManager = new DownloadManager(agent);
 
 // Helper to get session from header