feat: definition of done per project

A project can ask that tickets reach a DONE status only with their
checklist ticked (settings.checklistBeforeDone, off by default; absent
when saving means unchanged). Members get a 422 telling how many steps are
left; owners and admins may still close it. Settings has the switch and
the ticket's checklist says when the project asks for it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

libs/web/tracker/infrastructure/src/lib/adapters/mappers.ts

@@ -112,5 +112,6 @@ export function toSettingsInput(
       options: f.options,
       archived: f.archived,
     })),
+    checklistBeforeDone: !!settings.checklistBeforeDone,
   };
 }