feat(automations): form-driven branching rules, round-robin assignment, lead-linked activities

apps/api/src/activities/dto.ts

@@ -91,6 +91,10 @@ export class ListActivitiesQueryDto {
   @IsString()
   dealId?: string;
 
+  @IsOptional()
+  @IsString()
+  leadId?: string;
+
   /** Inclusive start (ISO). When set with/without filter, restricts dueAt. */
   @IsOptional()
   @IsDateString()