Remove membership derived struct fields

Signed-off-by: Émile Ré <emile@getprobo.com>

pkg/coredata/migrations/20260212T163603Z.sql

@@ -1,31 +1,2 @@
-ALTER TABLE
-    iam_memberships
-ADD
-    COLUMN profile_id REFERENCES iam_membership_profiles(id);
-
-UPDATE
-    iam_memberships m
-SET
-    profile_id = p.id
-FROM
-    iam_membership_profiles p
-WHERE
-    p.membership_id = m.id;
-
-DROP INDEX authz_memberships_user_id_organization_id_key;
-
-DROP INDEX idx_iam_memberships_identity_tenant_org;
-
-CREATE UNIQUE INDEX idx_iam_memberships_profile_id_idx ON iam_memberships(profile_id);
-
-ALTER TABLE
-    iam_memberships
-ALTER COLUMN
-    profile_id
-SET
-    NOT NULL,
-    DROP COLUMN organization_id,
-    DROP COLUMN identity_id;
-
 ALTER TABLE
     iam_membership_profiles DROP COLUMN membership_id;