reduce number of pr fetched in graphql query to avoid timeouts (#782)

Summary:
[isl] reduce number of pr fetched in graphql query to avoid timeouts
Stack created with Sapling.
-> #782
#781
Pull Request resolved: #782

Test Plan: Imported from GitHub, without a Test Plan: line.

Reviewed By: quark-zju

Differential Revision: D51630746

Pulled By: evangrayk

fbshipit-source-id: a7c3189e02a4c6da772dd9001e6b20078b5d7747

addons/isl-server/src/github/githubCodeReviewProvider.ts

@@ -64,7 +64,7 @@ export class GitHubCodeReviewProvider implements CodeReviewProvider {
           // This is not very easy with github's graphql API, which doesn't allow more than 5 "OR"s in a search query.
           // But if we used one-query-per-diff we would reach rate limiting too quickly.
           searchQuery: `repo:${this.codeReviewSystem.owner}/${this.codeReviewSystem.repo} is:pr author:@me`,
-          numToFetch: 100,
+          numToFetch: 50,
         });
         if (allSummaries?.search.nodes == null) {
           this.diffSummaries.emit('data', new Map());