[Improvement] Global Aggregated Dashboard for Multi-Project Monitoring

Nobody has claimed this yet.

First of all, congratulations to everyone involved in the development of RobotDashboard.
After testing the new version extensively, I am genuinely impressed with the overall quality and completeness of the solution.
The solution is very well designed and will be adopted in our projects going forward.

At the moment, we are running a setup where a central server initializes independent RobotDashboard instances per project. This allows us to maintain isolated dashboards, each customized according to the specific requirements of the respective project.

We would like to suggest the introduction of an additional higher-level dashboard layer capable of aggregating information from multiple active project dashboards/servers.

The idea would be to provide:
* A centralized management dashboard
* Cross-project KPI visualization
* Aggregated metrics and reporting
* Consolidated tables/data from all monitored projects
* High-level visibility without needing to access each individual project dashboard separately

Examples of useful aggregated information:
* Overall execution status across projects
* Pass/fail trends
* Execution duration metrics
* Environment health/status
* Unified reporting views
* Custom organizational KPIs

Although this may extend beyond the original scope of RobotDashboard, it would provide significant value from a management and operational perspective, especially for organizations managing multiple independent projects.
This would greatly simplify monitoring activities and improve visibility at a portfolio/program level.

Once again, congratulations for the excellent work and for building such a flexible and extensible solution.

No files, tests, or entry points are identified in the issue, so start by mapping how the existing project dashboards expose their data and how dashboard views are assembled. Done would require an agreed design and working centralized views for cross-project status, metrics, reporting, and organizational KPIs.

Written by the indexing model from the issue text.