Fix Russia station parser to read latest archive row

src/data_collection/russia_station_sources.py

@@ -175,7 +175,7 @@ class RussiaStationSourceMixin:
             return None
 
         pair_count = min(len(time_rows), len(data_rows)) - 1
-        for idx in range(pair_count):
+        for idx in range(pair_count - 1, -1, -1):
             time_row = time_rows[idx + 1]
             data_row = data_rows[idx + 1]
             if len(time_row) < 2 or len(data_row) < 6:

tests/test_russia_station_sources.py

@@ -38,3 +38,24 @@ def test_fetch_moscow_official_nearby_keeps_nearest_ten_station_rows():
     assert rows[0]["station_code"] == "27524"
     assert rows[1]["station_code"] == "27500"
     assert all(row["distance_km"] is not None for row in rows)
+
+
+def test_russia_weather_archive_parser_uses_latest_valid_row():
+    html = """
+    <table>
+      <tr><th>hour</th><th>date</th></tr>
+      <tr><td>09</td><td>11.04</td></tr>
+      <tr><td>21</td><td>17.04</td></tr>
+    </table>
+    <table>
+      <tr><th>a</th><th>b</th><th>c</th><th>d</th><th>cloud</th><th>temp</th></tr>
+      <tr><td>x</td><td>x</td><td>x</td><td>x</td><td>x</td><td>+4.2</td></tr>
+      <tr><td>x</td><td>x</td><td>x</td><td>x</td><td>x</td><td>+5.8</td></tr>
+    </table>
+    """
+
+    parsed = RussiaStationSourceMixin()._ru_parse_station_current_from_weather_html(html)
+
+    assert parsed["temp_c"] == 5.8
+    assert parsed["raw_hour"] == "21"
+    assert parsed["raw_day_month"] == "17.04"