Review and optimize monthly report generation (resource utilization)

Several sites are experiencing severe performance issues during monthly report generation:

* CPU usage spikes up to 200%
* DWH frontend becomes unresponsive
* Incoming CDA imports fail due to "OutOfMemory" errors

A comprehensive review and optimization of the report generation process is required. Areas to investigate:
1. End-to-end pipeline (UI implementation & Java backend processing)
3. XML Schema efficiency
4. SQL Query optimization

The goal is to reduce resource consumption and ensure stable operation of the DWH during report generation, preventing interference with other critical operations like CDA imports.