* Group heatmap actions by 15 minute intervals Signed-off-by: Sidd Weiker <[email protected]> * Add multi-contribution test for user heatmap Signed-off-by: Sidd Weiker <[email protected]> * Add timezone aware summation for activity heatmap Signed-off-by: Sidd Weiker <[email protected]> * Fix api user heatmap test Signed-off-by: Sidd Weiker <[email protected]> * Update variable declaration style Co-authored-by: Lunny Xiao <[email protected]> Co-authored-by: 6543 <[email protected]> Co-authored-by: techknowlogick <[email protected]>