feat: 利用 etag 节省内容传输，显式写明生命周期 (#464)

crates/bili_sync/src/bilibili/danmaku/ass_writer.rs

@@ -184,7 +184,7 @@ impl<'a, W: AsyncWrite> AssWriter<'a, W> {
     }
 }
 
-fn escape_text(text: &str) -> Cow<str> {
+fn escape_text(text: &'_ str) -> Cow<'_, str> {
     let text = text.trim();
     if memchr::memchr(b'\n', text.as_bytes()).is_some() {
         Cow::from(text.replace('\n', "\\N"))

crates/bili_sync/src/bilibili/video.rs

@@ -91,7 +91,7 @@ impl<'a> Video<'a> {
             .collect())
     }
 
-    pub async fn get_danmaku_writer(&self, page: &'a PageInfo) -> Result<DanmakuWriter> {
+    pub async fn get_danmaku_writer(&self, page: &'a PageInfo) -> Result<DanmakuWriter<'a>> {
         let tasks = FuturesUnordered::new();
         for i in 1..=page.duration.div_ceil(360) {
             tasks.push(self.get_danmaku_segment(page, i as i64));