update: db structure and api req

app/lib/pages/marker_handler/get_markers.dart

app/lib/pages/marker_handler/marker_data.dart

app/lib/pages/widgets/interactive_polygon.dart

app/lib/pages/widgets/map_widget.dart

server/__pycache__/consts.cpython-311.pyc

server/consts.py

server/map/__pycache__/get_markers.cpython-311.pyc

server/map/divide_measurement.py

server/map/get_markers.py

server/sql_db/icedb

server/sql_db/schema.sql