alter table crm_expansion_followup
  add column if not exists source_type varchar(30),
  add column if not exists source_id bigint;

alter table crm_opportunity_followup
  add column if not exists source_type varchar(30),
  add column if not exists source_id bigint;

create index if not exists idx_crm_expansion_followup_source
  on crm_expansion_followup(source_type, source_id);

create index if not exists idx_crm_opportunity_followup_source
  on crm_opportunity_followup(source_type, source_id);