District map geometry attribution

Source: https://github.com/alabacakmurat/turkiye-iller-ve-ilceler-svg-json
Revision: 39c8cee59508e537ff08eecc9a7ffb4c86681aed
Original file: turkeys-districts.json
License: GNU GPL version 3; see /licenses/turkey-districts.txt

The JSON geometry files in /maps/districts/ are derived from the source above.
Modifications: stripped demographic and duplicate polygon fields, rounded SVG
coordinates to two decimal places, computed view boxes and interior label points,
and split into one file per province. Source and regeneration instructions are
in scripts/import-district-maps.mjs and README.md.

The 81 provinces and 973 district geometries reflect the source dataset;
this is not an official administrative boundary service. Party percentages
shown by the application are separate illustrative sample data.