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_metadata.go

@@ -129,7 +129,8 @@ func getValueForMetadataKey(user *ScimUser, key metadata.Key) ([]byte, error) {
 		metadata.KeyAddresses,
 		metadata.KeyEntitlements,
 		metadata.KeyIms,
-		metadata.KeyPhotos:
+		metadata.KeyPhotos,
+		metadata.KeyEmails:
 		val, err := json.Marshal(value)
 		if err != nil {
 			return nil, err
@@ -223,6 +224,8 @@ func getRawValueForMetadataKey(user *ScimUser, key metadata.Key) interface{} {
 		return user.Locale
 	case metadata.KeyTimezone:
 		return user.Timezone
+	case metadata.KeyEmails:
+		return user.Emails
 	case metadata.KeyProvisioningDomain:
 		break
 	}