feat: implement AMOS real-time weather data collection and add corresponding unit and frontend tests

tests/test_amos_station_sources.py

@@ -1,4 +1,8 @@
-from src.data_collection.amos_station_sources import AmosStationSourceMixin, _amos_parse_runway_table
+from src.data_collection.amos_station_sources import (
+    AmosStationSourceMixin,
+    _amos_extract_observation_time,
+    _amos_parse_runway_table,
+)
 
 
 def test_amos_parser_handles_current_public_page_format():
@@ -46,6 +50,15 @@ def test_amos_parser_handles_current_public_page_format():
     assert parsed["rvr"][0] == 2000
 
 
+def test_amos_observation_time_uses_page_kst_timestamp_as_utc_iso():
+    html = "[김해공항 (RKPK) 2026년 05월 27일 09:58 KST]"
+
+    obs_utc, obs_local = _amos_extract_observation_time(html, "RKPK")
+
+    assert obs_utc == "2026-05-27T00:58:00Z"
+    assert obs_local == "2026-05-27 09:58:00"
+
+
 def test_amos_get_page_rejects_ignored_query_returning_default_rksi():
     class FakeCollector(AmosStationSourceMixin):
         timeout = 1.0