台北走 METAR 集群兜底：ICAO 从 CWA 站号 466920 改为 RCSS

- weather_sources: 放开 cwa settlement_source 的 METAR 拦截
- Rust: ICAO 改用 RCSS，匹配 METAR 集群数据
- 原因: CWA_OPEN_DATA_AUTH 未配置，CWA 接口静默失败致 airport_obs_log 无数据

monitoring-web/src/main.rs

@@ -29,7 +29,7 @@ const CITIES: &[(&str, &str, &str, &str, i32, f64, &str)] = &[
     ("paris", "巴黎", "LFPB", "Le Bourget", 2, 3.0, "CEST"),
     ("hong kong","香港","HKO","Observatory",8,1.5,"HKT"),
     ("lau fau shan","流浮山","LFS","Lau Fau Shan",8,1.5,"HKT"),
-    ("taipei", "台北", "466920", "Songshan", 8, 1.5, "TST"),
+    ("taipei", "台北", "RCSS", "Songshan", 8, 1.5, "TST"),
 ];
 
 // ── app state ──

src/data_collection/weather_sources.py

@@ -856,7 +856,7 @@ class WeatherDataCollector(OpenMeteoCacheMixin, SettlementSourceMixin, MetarSour
         if (
             city_lower not in self.CITY_METAR_CLUSTERS
             or "mgm_nearby" in results
-            or settlement_source in {"hko", "cwa"}
+            or settlement_source in {"hko"}
         ):
             return
         cluster_icaos = self.CITY_METAR_CLUSTERS[city_lower]