Week 26 - R04154

• Improve and expand purge functionality which is responsible for managing the cache, to keep it fast and do auto clean up of older data.
• Add purge variables to System User for easier adoption.
• Improve functionality/flexibiliy for future holds, to be able to select and set them for other FDs than the current one.
• Expand API call to check if PD has INV flow.
• Add PackML equipment state types to configuration.