Work Items list [BE] - Add Missing Filters: Health, Iteration, Weight, Release, Contact, Organisation

Add additional filters to backend workItems GraphQL API to match legacy issues filters, including

• Epic/Parent
  • Equals (GID)
  • In List (array) This is not parity, not needed as scope, only nice to have
  • Not Equals (GID/array): #548093 (closed)
  • Wildcard (any/none): #548093 (closed)
• Health
  • Equals (enum value - on track, needs attention, etc)
  • Wildcard (enum: any/none)
  • Not Equals (enum value)
• Cadence
  • Equals (GID)
  • In List (array)
• Iteration
  • Equals (GID)
  • In List (array)
  • Not Equals (GID/array)
  • Wildcard (enum: any/none/current)
• Weight
  • Equals (number)
  • Not Equals (number)
  • Wildcard (enum: any/none)
• Release
• Contact
• Organisation

Also:

• Update workItemStateCounts to take these filters and calculate the correct counts accordingly