fix(scim): add type attribute to ScimEmail (#9690)

# Which Problems Are Solved

- SCIM PATCH operations for users from Entra ID for the `emails`
attribute fails due to missing `type` subattribute

# How the Problems Are Solved

- Adds the `type` attribute to the `ScimUser` struct and sets the
default value to `"work"` in the `mapWriteModelToScimUser()` method.

# Additional Changes

# Additional Context

The SCIM handlers for POST and PUT ignore multiple emails and only uses
the primary email for a given user, or falls back to the first email if
none are marked as primary. PATCH operations however, will attempt to
resolve the provided filter in `operations[].path`.

Some services, such as Entra ID, only support patching emails by
filtering for `emails[type eq "(work|home|other)"].value`, which fails
with Zitadel as the ScimUser struct (and thus the generated schema)
doesn't include the `type` field.

This commit adds the `type` field to work around this issue, while still
preserving compatibility with filters such as `emails[primary eq
true].value`.

-
https://discord.com/channels/927474939156643850/927866013545025566/1356556668527448191

---------

Co-authored-by: Christer Edvartsen <christer.edvartsen@nav.no>
Co-authored-by: Thomas Siegfried Krampl <thomas.siegfried.krampl@nav.no>

internal/api/scim/resources/user_mapping.go

@@ -382,6 +382,10 @@ func (h *UsersHandler) mapAndValidateMetadata(ctx context.Context, user *ScimUse
 	if err := extractJsonMetadata(ctx, md, metadata.KeyRoles, &user.Roles); err != nil {
 		logging.OnError(err).Warn("Could not deserialize scim roles metadata")
 	}
+
+	if err := extractJsonMetadata(ctx, md, metadata.KeyEmails, &user.Emails); err != nil {
+		logging.OnError(err).Warn("Could not deserialize scim emails metadata")
+	}
 }
 
 func (h *UsersHandler) buildResourceForQuery(ctx context.Context, user *query.User) *schemas.Resource {