r2024.04.03-421
* CH Migration: exit/entry hostnames in sessions_v2 * Leave only exit_page_hostname, we already record hostnames * Use ClickHouse DDL in favour of ecto so that cluster is included * Compress with ZSTD(3)
* CH Migration: exit/entry hostnames in sessions_v2 * Leave only exit_page_hostname, we already record hostnames * Use ClickHouse DDL in favour of ecto so that cluster is included * Compress with ZSTD(3)