feat: sprints with burndown and carry-over

Plan sprints with dates and a goal, run one at a time per project, and
put tickets in them from the ticket page. The Sprints tab follows the one
under way with its progress and a burndown in tickets or points against
the ideal line. Closing a sprint sends what was left to the next one or
back to the backlog; the board can be filtered by sprint.

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

libs/api/tracker/application/src/lib/queries/query-handlers.ts

@@ -17,6 +17,7 @@ import { GetReleasesQueryHandler } from './get-releases.query-handler';
 import { GetUpcomingReleasesQueryHandler } from './get-upcoming-releases.query-handler';
 import { SearchIssuesQueryHandler } from './search-issues.query-handler';
 import { GetEpicsQueryHandler } from './get-epics.query-handler';
+import { SPRINT_QUERY_HANDLERS } from './sprint.queries';
 import { SearchMyIssuesQueryHandler } from './search-my-issues.query-handler';
 
 export const QUERY_HANDLERS = [
@@ -38,6 +39,7 @@ export const QUERY_HANDLERS = [
   GetUpcomingReleasesQueryHandler,
   SearchIssuesQueryHandler,
   GetEpicsQueryHandler,
+  ...SPRINT_QUERY_HANDLERS,
   SearchMyIssuesQueryHandler,
   GetAttachmentQueryHandler,
 ];