GitHub integration: okit.rest.issues.createComment is not a function #10691

Bug Description

When commenting inside Huly on issues synced with GitHub, comments are not created on GitHub. The GitHub integration service (github-1 container) logs the following error:

TypeError: okit.rest.issues.createComment is not a function
    at CommentSyncManager.createGithubComment (/usr/src/app/bundle.js:294043:47)

GitHub → Huly sync works fine; only Huly → GitHub comment creation is broken.

Root Cause

In services/github/pod-github/src/sync/comments.ts, the createGithubComment and updateComment methods obtain an Octokit instance via:

const okit = (await this.provider.getOctokit(ctx, chatMessage.modifiedBy)) ?? container.container.octokit

The user-scoped Octokit returned by getOctokit() may not have the .rest plugin properly available. This is the same class of bug that was fixed in #10442 for okit.graphql is not a function, where ensureGraphQLOctokit() was introduced as a guard. However, that fix only covered GraphQL calls and missed the two REST API calls (createComment and updateComment) in the same file.

Environment

• Self-hosted v0.7.382 on PostgreSQL

Fix

Apply the same safety pattern used in #10442: add an ensureRESTOctokit() function that validates the .rest plugin is available on the Octokit instance, falling back to the installation Octokit when it's not.