Don't expand bundles when adding cards. Leave the aggregation time fixed for now

db/migrate/20250826131458_remove_unique_constraint_from_notification_bundles_user_id.rb

@@ -0,0 +1,6 @@
+class RemoveUniqueConstraintFromNotificationBundlesUserId < ActiveRecord::Migration[8.1]
+  def change
+    remove_index :notification_bundles, :user_id, unique: true
+    add_index :notification_bundles, %i[ ends_at status ]
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema[8.1].define(version: 2025_08_26_084559) do
+ActiveRecord::Schema[8.1].define(version: 2025_08_26_131458) do
   create_table "accesses", force: :cascade do |t|
     t.datetime "accessed_at"
     t.integer "collection_id", null: false
@@ -302,9 +302,9 @@ ActiveRecord::Schema[8.1].define(version: 2025_08_26_084559) do
     t.integer "status", default: 0, null: false
     t.datetime "updated_at", null: false
     t.integer "user_id", null: false
+    t.index ["ends_at", "status"], name: "index_notification_bundles_on_ends_at_and_status"
     t.index ["user_id", "starts_at", "ends_at"], name: "idx_on_user_id_starts_at_ends_at_7eae5d3ac5"
     t.index ["user_id", "status"], name: "index_notification_bundles_on_user_id_and_status"
-    t.index ["user_id"], name: "index_notification_bundles_on_user_id", unique: true
   end
 
   create_table "notifications", force: :cascade do |t|

db/schema_cache.yml

@@ -2352,10 +2352,11 @@ indexes:
     valid: true
   - !ruby/object:ActiveRecord::ConnectionAdapters::IndexDefinition
     table: notification_bundles
-    name: index_notification_bundles_on_user_id
-    unique: true
+    name: index_notification_bundles_on_ends_at_and_status
+    unique: false
     columns:
-    - user_id
+    - ends_at
+    - status
     lengths: {}
     orders: {}
     opclasses: {}
@@ -2860,4 +2861,4 @@ indexes:
     comment:
     valid: true
   workflows: []
-version: 20250826084559
+version: 20250826131458