Add Guangzhou city support and prewarm defaults

.env.example

@@ -109,7 +109,7 @@ GROQ_API_KEY=
 POLYWEATHER_GROQ_COMMENTARY_MODEL=openai/gpt-oss-20b
 POLYWEATHER_GROQ_COMMENTARY_TIMEOUT_SEC=8
 POLYWEATHER_GROQ_COMMENTARY_CACHE_TTL_SEC=1800
-POLYWEATHER_PREWARM_CITIES=ankara,istanbul,shanghai,beijing,shenzhen,wuhan,chengdu,chongqing,hong kong,taipei,singapore,tokyo,seoul,busan,london,paris,madrid
+POLYWEATHER_PREWARM_CITIES=ankara,istanbul,shanghai,beijing,shenzhen,guangzhou,wuhan,chengdu,chongqing,hong kong,taipei,singapore,tokyo,seoul,busan,london,paris,madrid
 
 # Weekly reward / leaderboard
 POLYWEATHER_WEEKLY_REWARD_ENABLED=true

config/config.yaml

@@ -81,6 +81,11 @@ cities:
   country: China
   latitude: 22.6393
   longitude: 113.8107
+- id: guangzhou
+  city: Guangzhou
+  country: China
+  latitude: 23.3924
+  longitude: 113.2988
 - id: beijing
   city: Beijing
   country: China

src/data_collection/city_registry.py

@@ -637,6 +637,24 @@ CITY_REGISTRY = {
         "distance_km": 32.0,
         "warning": "市场现按 Wunderground 深圳宝安国际机场站整度°C口径结算；以历史页当日最终完成后的最高整度摄氏值为准。",
     },
+    "guangzhou": {
+        "name": "Guangzhou",
+        "lat": 23.3924,
+        "lon": 113.2988,
+        "icao": "ZGGG",
+        "settlement_source": "wunderground",
+        "settlement_station_code": "ZGGG",
+        "settlement_station_label": "Guangzhou Baiyun International Airport Station",
+        "settlement_url": "https://www.wunderground.com/history/daily/cn/guangzhou/ZGGG",
+        "tz_offset": 28800,
+        "use_fahrenheit": False,
+        "is_major": True,
+        "risk_level": "medium",
+        "risk_emoji": "🟡",
+        "airport_name": "广州白云国际机场",
+        "distance_km": 28.0,
+        "warning": "市场现按 Wunderground 广州白云国际机场站整度°C口径结算；珠三角海陆风与午后对流会让峰值兑现时间出现摇摆。",
+    },
     "beijing": {
         "name": "Beijing",
         "lat": 40.0801,
@@ -828,11 +846,13 @@ ALIASES = {
     "ctu": "chengdu", "cd": "chengdu",
     "ckg": "chongqing", "cq": "chongqing",
     "szx": "shenzhen", "sz": "shenzhen",
+    "can": "guangzhou", "gz": "guangzhou", "zggg": "guangzhou",
     "pek": "beijing", "bjs": "beijing", "bj": "beijing",
     "wuh": "wuhan", "wh": "wuhan",
     "成都": "chengdu",
     "重庆": "chongqing",
     "深圳": "shenzhen",
+    "广州": "guangzhou",
     "北京": "beijing",
     "武汉": "wuhan",
 }

src/data_collection/country_networks.py

@@ -10,6 +10,7 @@ CHINA_CMA_CITIES = {
     "beijing",
     "chengdu",
     "chongqing",
+    "guangzhou",
     "shanghai",
     "shenzhen",
     "wuhan",

src/data_collection/weather_sources.py

@@ -53,6 +53,7 @@ class WeatherDataCollector(OpenMeteoCacheMixin, SettlementSourceMixin, MetarSour
         "taipei": ["RCSS", "RCTP"],
         "chengdu": ["ZUUU", "ZUTF"],
         "chongqing": ["ZUCK", "ZUPS"],
+        "guangzhou": ["ZGGG", "ZGSZ"],
         "shenzhen": ["ZGSZ", "ZGGG"],
         "beijing": ["ZBAA", "ZBAD"],
         "wuhan": ["ZHHH", "ZHES"],

src/utils/prewarm_dashboard.py

@@ -20,6 +20,7 @@ DEFAULT_CITIES = [
     "shanghai",
     "beijing",
     "shenzhen",
+    "guangzhou",
     "wuhan",
     "chengdu",
     "chongqing",

web/routes.py

@@ -76,6 +76,7 @@ DEFAULT_PREWARM_CITIES = [
     "shanghai",
     "beijing",
     "shenzhen",
+    "guangzhou",
     "wuhan",
     "chengdu",
     "chongqing",