Collect metrics for campaigns funnel

Created by: rrhyne

To derive a campaigns funnel from ping data we need to collect the following metrics. @ebrodymoore suggested how to store and collect this information. Those suggestions are in ().

• Created page viewed (eventLog)
• Spec created (either)
• Preview page viewed (eventLog)
• Spec applied (creates the campaign)
  • Number of changesets unpublished (db Eric thinks it is less reliable to get this data from an event log for viewing)
  • If we want the number of changesets for spec we don’t want to process multiple event logs and risk out of date or dupe entries.
  • Also affects number of changesets overall
• Number of changesets open (same as above)
• Number of changesets merged (same as above)
• Campaign closed (db)