[SCIM] Common Attribute "id" must be unique

[schurlinga]

According to RFC 7643 - Common Attributes, "id" must be unique:

A unique identifier for a SCIM resource as defined by the service provider. Each representation of the resource MUST include a non-empty "id" value. This identifier MUST be unique across the SCIM service provider's entire set of resources.

The "id" attribute should be added as 'unique' within StandardSchemas.StandardResponseSchemas:

https://github.com/simpleidserver/SimpleIdServer/blob/ed077178cd645a92c4aab502b4266b3f923313fb/src/Scim/SimpleIdServer.Scim.Domains/StandardSchemas.cs#L191C9-L192C218

[simpleidserver]

Hello,

We have made some modifications to adhere to the RFC. Now, by default, the id has the following characteristics:

• CaseExact: true
• Mutability : readOnly
• returned: always
• Uniqueness : GLOBAL

KR,

SID