Create metrics endpoints for TMF Resource related information

Create endpoints:

• GET /tmf-api/metrics/totalResources (optional params - state)
  • Exp. Resp: { totalResources: 32 }
• GET /tmf-api/metrics/resourcesGroupByState (params - starttime: ISOdatetime and endtime:ISOdatetime e.g. 2025-04-14T11:08:10Z) - allow max 31 days diff / double check the TMF state names
  • Exp. Resp:

{ 
 resources: {
   total: 10, 
   aggregations: {
     groupByState: {  
       [{ key:"RESERVED", count: 2 }, { key:"AVAILABLE", count: 2 }, { key:"ALARM", count: 2 }, { key:"UNKNOWN", count: 2 }, { key:"SUSPENDED", count: 2 } ]
     }
   }
 }
}