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

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

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

@@ -1,8 +1,3 @@
-import { Readable } from 'node:stream';
-
-import { readBufferWithLimit } from '../../../base';
-import { MAX_EMBEDDABLE_SIZE } from './types';
-
 export class GqlSignal implements AsyncDisposable {
   readonly abortController = new AbortController();
 
@@ -14,10 +9,3 @@ export class GqlSignal implements AsyncDisposable {
     this.abortController.abort();
   }
 }
-
-export function readStream(
-  readable: Readable,
-  maxSize = MAX_EMBEDDABLE_SIZE
-): Promise<Buffer> {
-  return readBufferWithLimit(readable, maxSize);
-}