Separate SCIM export email from event user name

Load identity email for matched profiles and drop parsing
userName as email; user_name column stays the event value.

Signed-off-by: Cursor Agent <cursoragent@cursor.com>

Co-authored-by: Bryan FRIMIN <bryan@frimin.fr>

pkg/coredata/membership_profile.go

@@ -507,7 +507,7 @@ SELECT
     p.id,
     p.identity_id,
     p.organization_id,
-    ''::citext AS email_address,
+    i.email_address,
     p.source,
     p.state,
     p.full_name,
@@ -540,6 +540,8 @@ SELECT
     p.updated_at
 FROM
     iam_membership_profiles p
+INNER JOIN identities i
+    ON i.id = p.identity_id
 WHERE
     p.%s
     AND p.organization_id = @organization_id