feat(server): global embedding gql endpoint (#11809)

fix AI-30
fix AI-31
fix PD-2487

packages/backend/server/src/plugins/copilot/utils.ts

@@ -0,0 +1,11 @@
+import { Readable } from 'node:stream';
+
+import { readBufferWithLimit } from '../../base';
+import { MAX_EMBEDDABLE_SIZE } from './types';
+
+export function readStream(
+  readable: Readable,
+  maxSize = MAX_EMBEDDABLE_SIZE
+): Promise<Buffer> {
+  return readBufferWithLimit(readable, maxSize);
+}