Adds file-provisioned dashboard with 5 panels:
- Container Log Volume Over Time (all 9 containers)
- Error Rate Across All Containers (percentage stat)
- Log Level Distribution Per Container (stacked bar chart)
- Container Health Status (green/red per container)
- Total Request Count Over Time (backend requests/min)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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