"REORG" activity type clarified as worthless removal

Broker API

Clarifies the documentation for the REORG value on the ActivityType and ActivitySubType schemas. REORG covers worthless removals only (sub-type WRM), while REO covers broader reorganization corporate actions (sub-types REOS, REOC, REOSC). Values and behavior are unchanged.

Affected Endpoints

• GET /v1/accounts/activities
• GET /v1/accounts/activities/{activity_type}