Change checkpoint's table DDL, set column measured_by_atum_agent to h…

…ave NOT NULL constraint with DEFAULT FALSE #242

Made changes:
1. Changed the value of measured_by_atum_agent in Checkpoints DDL to NOT NULL.
2. Changed the value of measured_by_atum_agent in Checkpoints DDL to DEFAULT FALSE.
3. Changed the value of measured_by_atum_agent in Write Checkpoints to DEFAULT FALSE.
4. Changed the tests to accommodate this change, it has been tested successfully.
5. Made changes to the WriteCheckpoint.scala files.

server/src/main/scala/za/co/absa/atum/server/api/database/runs/functions/WriteCheckpoint.scala

@@ -42,8 +42,8 @@ class WriteCheckpoint(implicit schema: DBSchema, dbEngine: DoobieEngine[Task])
         fr"${values.processStartTime}",
         fr"${values.processEndTime}",
         fr"${values.measurements.toList.map(_.asJson)}",
-        fr"${values.measuredByAtumAgent}",
-        fr"${values.author}"
+        fr"${values.author}",
+        fr"${values.measuredByAtumAgent}"
       )
     )
     with StandardStatusHandling

server/src/main/scala/za/co/absa/atum/server/api/database/runs/functions/WriteCheckpointV2.scala

@@ -39,8 +39,8 @@ class WriteCheckpointV2(implicit schema: DBSchema, dbEngine: DoobieEngine[Task])
         fr"${args.checkpointV2DTO.processStartTime}",
         fr"${args.checkpointV2DTO.processEndTime}",
         fr"${args.checkpointV2DTO.measurements.toList.map(_.asJson)}",
-        fr"${args.checkpointV2DTO.measuredByAtumAgent}",
-        fr"${args.checkpointV2DTO.author}"
+        fr"${args.checkpointV2DTO.author}",
+        fr"${args.checkpointV2DTO.measuredByAtumAgent}"
       ),
       Some("write_checkpoint")
     )