Hide some profile properties from context request when requirered is set to with all (*)

To prevent access to all property names when such event is sent to the context endpoint:

{
	"requiredProfileProperties": [
		"*"
	],

	"events": [
		
	]
}

We need to introduce a mechanism that hides select profile properties in the response.

A new system tag is added at property type level named: concealed, when set the property is only returned if accessed directly.

Use cases

For a given property type myType with the system tag concealed
A profile with that property set only.
the following payload:

{
	"requiredProfileProperties": [
		"*"
	],
...

returns no property

{
	"requiredProfileProperties": [
		"myType"
	],
...

returns the property

{
	"requiredProfileProperties": [
                "*",
		"myType"
	],
...

returns the property