feat: saved board views and richer board filters

The board now filters by text, type, priority and unassigned tickets as
well. Any combination can be saved as a named view, private or shared with
the project, and opened again with one click.

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

libs/api/tracker/infrastructure/src/lib/mongo/upsert-materialized.repositories.ts

@@ -29,6 +29,7 @@ import {
   ProjectDoc,
   ReadModels,
   ReleaseDoc,
+  SavedFilterDoc,
   TimelineDoc,
 } from './read-model.schemas';
 import { upsertIfNewer } from './upsert-if-newer';
@@ -44,6 +45,8 @@ export class MongoUpsertMaterializedProjectRepository extends UpsertMaterialized
     private readonly activity: Model<ActivityDoc>,
     @InjectModel(ReadModels.Timeline)
     private readonly timeline: Model<TimelineDoc>,
+    @InjectModel(ReadModels.SavedFilter)
+    private readonly savedFilters: Model<SavedFilterDoc>,
   ) {
     super();
   }
@@ -53,6 +56,8 @@ export class MongoUpsertMaterializedProjectRepository extends UpsertMaterialized
       this.projects.deleteOne({ _id: projectId }),
       this.activity.deleteMany({ projectId }),
       this.timeline.deleteMany({ projectId }),
+      // Views of the board of a project that is gone.
+      this.savedFilters.deleteMany({ projectId }),
     ]);
   }