fix(core): transcript cannot retry (#15476)

#### PR Dependency Tree


* **PR #15476** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Bug Fixes**
- Improved connectivity for AI services configured with a global
location while preserving support for regional locations.
- Failed audio transcription jobs can now be restarted without
recreating the job.
- Preserved existing behavior for transcription jobs that are still
waiting or already in other non-retryable states.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/core/src/modules/media/entities/audio-attachment-block.ts

@@ -169,8 +169,8 @@ export class AudioAttachmentBlock extends Entity<AttachmentBlockModel> {
 
   readonly transcribe = async () => {
     try {
-      // if job is already running, we should not start it again
-      if (this.transcriptionJob.status$.value.status !== 'waiting-for-job') {
+      const initialStatus = this.transcriptionJob.status$.value.status;
+      if (initialStatus !== 'waiting-for-job' && initialStatus !== 'failed') {
         return;
       }
       const status = await this.transcriptionJob.start();