Give additonal detail information on user (topic) stats endpoint

[ElJocho]

Adjust the user stats endpoint and report on creations, deletions and modifications for topics.

This way (HOT Tasking Manager) users will hopefully not be as confused/unsatisfied by our current aggregated delta approach anymore. Adding more details will allow the HOT Tasking Manager to adjust their UI to break down the overall total numbers.

This is how the response could look like:

{
  "buildings":1806,
  "buildings_created":1816,
  "buildings_modified":55,
  "buildings_deleted":10,
  "roads":236.345,
  "roads_created":266.345,
  "roads_modified":10,
  "roads_deleted":40,
  "edits":3397,
  "changesets":291,
  "userId":996790
}

To be discussed:

What do users expect for roads_modified? Should this only consider edits which change the geometry of the road? What about tag changes to existing roads?

option 1:

• modified roads considers the km change in length for a road that existed before
• this could be a positive number (e.g. if you add more nodes to an existing road)
• this could also be a negative number (e.g. if you delete nodes from an existing road)
• tag changes would not be considered at all as the length change is 0

option 2:

• separately report of modified-longer and modified-shorter
• still tag changes would not be considered

[ElJocho]

To continue working on this issue we will postpone the decision on if we want to report tag changes for length and area based "topics" and will in a first step only report on geometry changes.

[mmerdes]

was automatically closed by merging the PR => reopened again to finish