The AI service now uses only buildUnifiedResourceContext() for
infrastructure context, since the resourceProvider is always set
during router initialization.
Removed:
- buildInfrastructureContext() function (~288 lines of dead code)
- Legacy fallback path in buildSystemPrompt()
The unified resource context provides a cleaner, deduplicated view
of infrastructure that includes:
- All resources grouped by platform and type
- Top CPU/Memory/Disk consumers
- Active alerts on resources
- Infrastructure summary statistics
This completes the AI service migration to unified resources.