Integrate Office job status with Redis pub/sub (Task 064)

[spaarke-dev]

Context

4 TODO comments in OfficeJobStatusService.cs reference Task 064 for publishing job status updates to Redis pub/sub and updating Dataverse ProcessingJob records. Currently job status is only logged.

Affected Files

• src/server/api/Sprk.Bff.Api/Workers/Office/OfficeJobStatusService.cs (lines 35, 49, 64, 80)
• src/server/api/Sprk.Bff.Api/Services/Office/JobStatusService.cs (lines 21, 278)

What Needs to Happen

1. Implement Redis pub/sub publishing for job status changes
2. Update Dataverse ProcessingJob records when SDK is integrated
3. Enable real-time job status monitoring for Office add-in UI

Source: Code quality audit task 031.