distro_info: read the YAML local series path, drop the dead dist_info stanza

distro_info.yml

@@ -3,10 +3,9 @@
 ## update and maintain such data in one unique place
 ## The goal is to have the minimal possible set of data necessary
 ## to grab the actual data. For example we don't want to store every Ubuntu
-## or Debian series, but rather an URL where we can properly access that data.
+## or Debian series, but rather pointers to where that data lives: each dist
-dist_info:
+## entry below carries its series sources (the local distro-info CSV, with
-  local: /usr/share/distro-info/{dist}
+## the network URL as fallback).
-  network: https://salsa.debian.org/debian/distro-info-data/-/raw/main/
 dist:
   debian:
     base_url: https://deb.debian.org/debian

src/distro_info.rs

@@ -240,7 +240,7 @@ pub async fn get_ordered_series(dist: &str) -> Result<Vec<SeriesInformation>, Bo
     })?;
     let series_info = &dist_data.series;
     let content = if Path::new(series_info.local.as_str()).exists() {
-        std::fs::read_to_string(format!("/usr/share/distro-info/{dist}.csv")).map_err(|e| {
+        std::fs::read_to_string(series_info.local.as_str()).map_err(|e| {
             format!(
                 "Failed to read distribution series data for '{dist}' \
                      from '{}': {}. The 'distro-info' package provides these CSV files.",