stub json and mapping, query in module (module name needs thought)
things from limelight for stacked

all but stacked graph itself should be config
Renamed VolumetricsCollection to CompletionCollection
Feature test for stacked module
WIP
Fix stacked graph to work with stagecraft module
Extract categories to separate file
tests for categoriescollection
Linking stacked module with categories collection
Fix graph layout with labels
Change to grouped timeseries, fix tests of graphs
fix lint stuff
Move line label config to graph
Tests for line labels config
specs for stacked graph
add housing json
Amend mortgage size statistic to use median individual mortgage
Make delta arrows a lighter grey
Update statistic used in dashboards
Add stagecraft stubs for housing multi-stats data