fix(activities): keep lead activity actions in the detail card

The action row stretched off-screen and comments on automation activities were rejected once the saved note passed 2000 characters.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/src/activities/dto.ts

@@ -316,7 +316,7 @@ export class CreateActivityDto {
 
   @IsOptional()
   @IsString()
-  @MaxLength(2000)
+  @MaxLength(20000)
   description?: string;
 
   @IsOptional()
@@ -416,7 +416,7 @@ export class UpdateActivityDto {
 
   @IsOptional()
   @IsString()
-  @MaxLength(2000)
+  @MaxLength(20000)
   description?: string | null;
 
   @IsOptional()