[Feat]: Add information about last sync to envgene-inventory-service

[ormig]

Is your feature request related to a problem? Please describe

No response

Describe the solution you'd like

• As a User I want to understand sync schedule for envgene-inventory-service
• As a User I want to have information about the last successful sync for particular instance repository so that I can understand what is the actual state for the data

Describe alternatives you've considered

No response

Additional information

No response