⚙️ Sprint 3 Issues (Jobs + worker)

[kilted2000]

Issue: Add jobs table + API

POST /routes/plan

GET /jobs/{id}/status

GET /jobs/{id}/results
Milestone: Sprint 3

Issue: Worker skeleton for job processing

Background worker changes job status

Writes dummy data to results table
Milestone: Sprint 3

Issue: Frontend polling for job progress

Poll job status every 5s

Visual status updates