[Platform Observability] Create Grafana Dashboards for Job Status and System Metrics

[KCui0327]

📝 Description
Build dashboards that display job status, system metrics (CPU, memory, disk usage), and resource utilization per service or job. Dashboards should support drill-down, filtering, and time-range selection.

🎯 Acceptance Criteria

• Real-time display of job status and system metrics
• Filters for time-range and job/service selection
• Configurable to add new metrics in the future

🛠 Tasks

• Design dashboard layout
• Implement panels for jobs, CPU/memory, disk, and resource usage
• Configure refresh intervals and alerts on panel thresholds