feat: add runtime policy and observability

src/services/compress.rs

@@ -16,6 +16,7 @@ use img_parts::{Bytes as ImgBytes, DynImage, ImageEXIF, ImageICC};
 use oxipng::StripChunks;
 use rgb::FromSlice;
 use std::io::Cursor;
+use std::time::Instant;
 
 const TARGET_MIN_LONG_EDGE: u32 = 640;
 const TARGET_MIN_SCALE: f64 = 0.55;
@@ -287,7 +288,12 @@ pub async fn compress_image_bytes(
     max_height: Option<u32>,
     preserve_metadata: bool,
 ) -> Result<Vec<u8>, AppError> {
-    let max_image_pixels = state.config.max_image_pixels;
+    let started = Instant::now();
+    let bytes_in = input.len() as u64;
+    let max_image_pixels = crate::services::settings::runtime_policy(state)
+        .await?
+        .file_limits
+        .max_image_pixels;
     let permit = state
         .image_processing_semaphore
         .clone()
@@ -297,7 +303,7 @@ pub async fn compress_image_bytes(
             AppError::new(ErrorCode::Internal, "图片处理并发控制器已关闭").with_source(err)
         })?;
 
-    tokio::task::spawn_blocking(move || {
+    let result = match tokio::task::spawn_blocking(move || {
         let _permit = permit;
         compress_image_bytes_sync(
             input,
@@ -313,9 +319,19 @@ pub async fn compress_image_bytes(
         )
     })
     .await
-    .map_err(|err| {
-        AppError::new(ErrorCode::CompressionFailed, "图片处理任务异常退出").with_source(err)
-    })?
+    {
+        Ok(result) => result,
+        Err(err) => Err(
+            AppError::new(ErrorCode::CompressionFailed, "图片处理任务异常退出").with_source(err),
+        ),
+    };
+    crate::services::metrics::record_compression(
+        state,
+        started.elapsed(),
+        bytes_in,
+        result.as_ref().ok().map(|bytes| bytes.len() as u64),
+    );
+    result
 }
 
 #[allow(clippy::too_many_arguments)]