feat(server): converge legacy compatibility (#15426)

#### PR Dependency Tree


* **PR #15426** 👈

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

* **New Features**
* Added workspace BYOK profiles with provider/model catalogs, capability
validation, connection probing, credential rotation, reordering, and
secure local leases.
* Added Copilot route options, selectable targets, managed tiers,
explicit profile/model overrides, and improved streaming with tool
callbacks and abort support.
* Added Copilot availability controls to prevent access when the feature
is disabled.
* **Changes**
* Simplified Copilot configuration and removed legacy provider-specific
settings.
* Removed obsolete model, token-cost, transcript strategy, and provider
metadata fields from public responses.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/backend/server/src/plugins/copilot/cron.ts

@@ -5,6 +5,7 @@ import { JOB_SIGNAL, JobQueue, OneDay, OnJob } from '../../base';
 import { Models } from '../../models';
 
 const CLEANUP_EMBEDDING_JOB_BATCH_SIZE = 100;
+const BACKGROUND_COPILOT_JOB_PRIORITY = 100;
 
 declare global {
   interface Jobs {
@@ -71,9 +72,11 @@ export class CopilotCronJobs {
     const sessions = await this.models.copilotSession.toBeGenerateTitle();
 
     for (const session of sessions) {
-      await this.jobs.add('copilot.session.generateTitle', {
-        sessionId: session.id,
-      });
+      await this.jobs.add(
+        'copilot.session.generateTitle',
+        { sessionId: session.id },
+        { priority: BACKGROUND_COPILOT_JOB_PRIORITY }
+      );
     }
     this.logger.log(
       `Scheduled title generation for ${sessions.length} sessions`