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>

apps/mcp/src/app/api/taskstream.schema.ts

@@ -1747,6 +1747,8 @@ export interface components {
             issueTypes: components["schemas"]["IssueTypeOptionDto"][];
             areas: components["schemas"]["AreaOptionDto"][];
             customFields: components["schemas"]["CustomFieldDefinitionDto"][];
+            /** @description Definition of done: tickets reach DONE only with their checklist ticked */
+            checklistBeforeDone: boolean;
         };
         ProjectDto: {
             /** Format: uuid */
@@ -1895,6 +1897,8 @@ export interface components {
             areas: components["schemas"]["AreaOptionBodyDto"][];
             /** @description Absent: unchanged. Fields cannot be removed: archive them. */
             customFields?: components["schemas"]["CustomFieldDefinitionBodyDto"][];
+            /** @description Definition of done: tickets reach a DONE status only with their checklist ticked (owners and admins may override). Absent: unchanged */
+            checklistBeforeDone?: boolean;
         };
         /** @enum {string} */
         IssuePriority: "LOWEST" | "LOW" | "MEDIUM" | "HIGH" | "CRITICAL";