优化: Keep-Alive/rate-limiter/dead-code清理 + deploy.sh蓝绿自动检测 + 压测文档

src/db.rs

@@ -11,7 +11,7 @@ use crate::error::AppError;
 pub async fn insert_weather_data(pool: &PgPool, weather_data: &WeatherData, user_id: i32) -> Result<i32, AppError> {
     // 配额检查：非付费用户数据条数限制
     let user = get_user_by_id(pool, user_id).await?;
-    let is_active_member = user.is_member && user.membership_expires_at.map_or(true, |expires| expires > Utc::now());
+    let is_active_member = user.is_member && user.membership_expires_at.is_none_or(|expires| expires > Utc::now());
 
     // 维护模式：非会员使用更高的临时限额，防止资源滥用
     let is_maintenance = std::env::var("PAYMENT_MAINTENANCE_MODE").ok() == Some("true".to_string());
@@ -800,7 +800,7 @@ pub async fn get_user_quota(
 ) -> Result<(i64, bool, Option<chrono::DateTime<chrono::Utc>>, bool), AppError> {
     let user = get_user_by_id(pool, user_id).await?;
     let is_active_member = user.is_member
-        && user.membership_expires_at.map_or(true, |expires| expires > chrono::Utc::now());
+        && user.membership_expires_at.is_none_or(|expires| expires > chrono::Utc::now());
     let used = count_user_weather_data(pool, user_id).await?;
     Ok((used, is_active_member, user.membership_expires_at, user.is_member))
 }
@@ -879,10 +879,14 @@ pub async fn set_weather_favorite(
 
 #[derive(Debug, FromRow)]
 pub struct RefreshToken {
+    #[allow(dead_code)]
     pub id: i32,
     pub user_id: i32,
+    #[allow(dead_code)]
     pub token: String,
+    #[allow(dead_code)]
     pub expires_at: chrono::DateTime<chrono::Utc>,
+    #[allow(dead_code)]
     pub created_at: chrono::DateTime<chrono::Utc>,
 }
 
@@ -926,6 +930,7 @@ pub async fn verify_refresh_token(
         .ok_or_else(|| AppError::Unauthorized("Refresh token 无效或已过期".to_string()))
 }
 
+#[allow(dead_code)]
 pub async fn delete_refresh_token(pool: &PgPool, user_id: i32) -> Result<(), AppError> {
     let query = r#"DELETE FROM refresh_tokens WHERE user_id = $1"#;