fix(github): apply guest token to images in markdown sync (#10659)

* fix(github): apply guest token to images in markdown sync (#10516)

The appendGuestLinkToImage function existed but was never called from
getMarkdown(). Add it as the default preprocessor so image URLs include
a guest JWT token, allowing them to render on GitHub.

Signed-off-by: Daniel Kendall <dkendall@ledoweb.com>

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: Don Kendall <kendall@donkendall.com>

* fix: formatting (prettier/eslint)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Signed-off-by: Don Kendall <kendall@donkendall.com>

---------

Signed-off-by: Don Kendall <kendall@donkendall.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

services/github/pod-github/src/sync/issues.ts

@@ -523,9 +523,7 @@ export class IssueSyncManager extends IssueSyncManagerBase implements DocSyncMan
               info.repository as Ref<GithubIntegrationRepository>,
               container.project,
               taskTypes[0]._id,
-              repo as GithubIntegrationRepository & {
-                repository: IntegrationRepositoryData
-              },
+              repo,
               !markdownCompatible
             )
           },

services/github/pod-github/src/worker.ts

@@ -86,6 +86,7 @@ import { ReviewCommentSyncManager } from './sync/reviewComments'
 import { ReviewThreadSyncManager } from './sync/reviewThreads'
 import { ReviewSyncManager } from './sync/reviews'
 import { UsersSyncManager, fetchViewerDetails } from './sync/users'
+import { appendGuestLinkToImage } from './sync/guest'
 import { errorToObj } from './sync/utils'
 import {
   ContainerFocus,
@@ -243,7 +244,10 @@ export class GithubWorker implements IntegrationManager {
       concatLink(this.getBranding()?.front ?? config.FrontURL, `/browse/?workspace=${this.workspace.uuid}`),
       // TODO storage URL
       concatLink(this.getBranding()?.front ?? config.FrontURL, `/files/${this.workspace.uuid}/`),
-      preprocessor
+      preprocessor ??
+        (async (nodes) => {
+          appendGuestLinkToImage(nodes, this.workspace.uuid)
+        })
     )
   }