feat(server-go): 和风天气接入与高发病天气预警规则（#12）

server-go/internal/model/weather_alert.go

@@ -0,0 +1,18 @@
+package model
+
+import (
+	"encoding/json"
+	"time"
+)
+
+// WeatherAlert 高发病天气预警
+type WeatherAlert struct {
+	ID        string          `gorm:"type:uuid;primaryKey;default:gen_random_uuid()" json:"id"`
+	Disease   string          `gorm:"size:64" json:"disease"`
+	Level     string          `gorm:"size:16" json:"level"`
+	Reason    string          `gorm:"type:text" json:"reason"`
+	Snapshot  json.RawMessage `gorm:"type:jsonb" json:"snapshot,omitempty"`
+	CreatedAt time.Time       `gorm:"type:timestamptz" json:"createdAt"`
+}
+
+func (WeatherAlert) TableName() string { return "weather_alerts" }