fix: correct hash schema and stream hashing

apps/worker/src/hash-utils.ts

@@ -1,11 +1,12 @@
 import { createHash } from "node:crypto";
-import { promises as fs } from "fs";
+import { createReadStream } from "node:fs";
 
 export async function computeFileSha256(filePath: string): Promise<string> {
   const hash = createHash("sha256");
-  const content = await fs.readFile(filePath);
-
-  hash.update(content);
-
-  return hash.digest("hex");
+  const stream = createReadStream(filePath);
+  return await new Promise((resolve, reject) => {
+    stream.on("data", (chunk) => hash.update(chunk));
+    stream.on("error", reject);
+    stream.on("end", () => resolve(hash.digest("hex")));
+  });
 }