GitLab

 - Add module field ID
 - Rename db table (compose_module_form => compose_module_field)
 - Add id, created_at, updated_at, deleted_at db columns
 - Rename json to options, module_id to rel_module
 - Fix primary keys (now just ID), add unique indexes (mod+place, mod+name)
 - Add foreign key from fields to modules
 - module repo Update() func no longer does REPLACE but UPDATE
 - in updateFields(), fields are removed more precisely (only missing fields are removed)
 - Add integration tests for module/field updates