Expose enough shifts records to fill a schedule

ee/app/graphql/types/incident_management/oncall_rotation_type.rb

@@ -3,6 +3,8 @@
 module Types
   module IncidentManagement
     class OncallRotationType < BaseObject
+      MAX_SHIFTS_FOR_TIMEFRAME = 350
+
       graphql_name 'IncidentManagementOncallRotation'
       description 'Describes an incident management on-call rotation'
 
@@ -52,6 +54,7 @@ module Types
             ::Types::IncidentManagement::OncallShiftType.connection_type,
             null: true,
             description: 'Blocks of time for which a participant is on-call within a given time frame. Time frame cannot exceed one month.',
+            max_page_size: MAX_SHIFTS_FOR_TIMEFRAME,
             resolver: ::Resolvers::IncidentManagement::OncallShiftsResolver
     end
   end

ee/spec/graphql/types/incident_management/oncall_rotation_type_spec.rb

@@ -22,4 +22,9 @@ RSpec.describe GitlabSchema.types['IncidentManagementOncallRotation'] do
 
     expect(described_class).to have_graphql_fields(*expected_fields)
   end
+
+  it 'returns enough records to cover 2 weeks of hour-long shifts' do
+    expect(described_class::MAX_SHIFTS_FOR_TIMEFRAME).to be > 14 * 24 # 14 days * 24 hours
+    expect(described_class).to have_graphql_field(:shifts, max_page_size: described_class::MAX_SHIFTS_FOR_TIMEFRAME)
+  end
 end