[MM-42739] Insights - Top Channels API Endpoint (#19953)

* [MM-42739] Initial setup for top channels for team

* [MM-42739] Add initial tests

* [MM-42739] Update tests

* [MM-42739] Add top channels for user

* [MM-42739] Fix query

* [MM-42739] Update query

* [MM-42739] Improve query performance

* [MM-42739] Remove rank

* [MM-42739] Fix tests to use new time range today

* [MM-42739] Add tests for top channels for user

* [MM-42739] Add test for pagination

* Remove top channels by time struct

* [MM-42739] Update test names

* [MM-42739] Remove rank from top reactions

* [MM-42739] Return empty array instead of nil when result is empty

* [MM-42739] Add additional tests and update permissions check for teams

* [MM-42739] Add excluded channel tests for top reactions

* [MM-42739] Move insights to api4/insights and keep time range as string until required

* [MM-42739] Update queries only check DeleteAt after union

* [MM-42739] Improve query performance by using publicchannels table

* [MM-42739] Fix broken query after merge

store/storetest/mocks/ChannelStore.go

@@ -1508,6 +1508,52 @@ func (_m *ChannelStore) GetTeamMembersForChannel(channelID string) ([]string, er
 	return r0, r1
 }
 
+// GetTopChannelsForTeamSince provides a mock function with given fields: teamID, userID, since, offset, limit
+func (_m *ChannelStore) GetTopChannelsForTeamSince(teamID string, userID string, since int64, offset int, limit int) (*model.TopChannelList, error) {
+	ret := _m.Called(teamID, userID, since, offset, limit)
+
+	var r0 *model.TopChannelList
+	if rf, ok := ret.Get(0).(func(string, string, int64, int, int) *model.TopChannelList); ok {
+		r0 = rf(teamID, userID, since, offset, limit)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*model.TopChannelList)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(string, string, int64, int, int) error); ok {
+		r1 = rf(teamID, userID, since, offset, limit)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// GetTopChannelsForUserSince provides a mock function with given fields: userID, teamID, since, offset, limit
+func (_m *ChannelStore) GetTopChannelsForUserSince(userID string, teamID string, since int64, offset int, limit int) (*model.TopChannelList, error) {
+	ret := _m.Called(userID, teamID, since, offset, limit)
+
+	var r0 *model.TopChannelList
+	if rf, ok := ret.Get(0).(func(string, string, int64, int, int) *model.TopChannelList); ok {
+		r0 = rf(userID, teamID, since, offset, limit)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).(*model.TopChannelList)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(string, string, int64, int, int) error); ok {
+		r1 = rf(userID, teamID, since, offset, limit)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // GroupSyncedChannelCount provides a mock function with given fields:
 func (_m *ChannelStore) GroupSyncedChannelCount() (int64, error) {
 	ret := _m.Called()