query mapping_sessions table instead of results table

Author: Hagellach37

mapswipe_workers/mapswipe_workers/generate_stats/generate_stats.py

@@ -11,12 +11,12 @@ def get_recent_projects(hours: int = 3):
     pg_db = auth.postgresDB()
     query_insert_results = """
         select project_id
-        from results
+        from mapping_sessions
         -- Using timestamp attribute here which is set for all projects
         -- and also represents the start_time for newer projects.
         -- "Old" projects have no start_time attribute.
         -- There is an index defined on "timestamp".
-        where "timestamp" >= %(timestamp)s
+        where start_time >= %(timestamp)s
         group by project_id
     """
     timestamp = (dt.datetime.utcnow() - dt.timedelta(hours=hours)).isoformat()[