GET for clients

URL for a single resource: /api/2/clients/<client_id>
URL for a collection: /api/2/clients

Permissions Required for the API Key: 
* Overall Admin Level = Admin
* Manage Jobs and Clients = Read (or Read/Write)

Filter Options for a collection (query string vars):
* 'page' (integer). As in, 'which page'. Page size is 25 items
* 'start' (date, example 2026-08-01)
* 'end' (date, example 2026-08-02)
* 'ref' (willing to act ass a reference. Values: 'All' | 'Yes' | 'No' | 'Unasked'. The default is 'All' )
* 'against' ( The date range is applied against.  The default is'clientCreationDate' )
  Values:
	'hasjob' - Looks for clients with a job that has a 'job start date' within the filter date range
	'clientCreationDate'. Looks for clients where the client record's creation date falls within the filter date range

