feat: 新增 Amlogic AMLENC 硬件编码支持

- 新增动态加载及 ABI 校验的 AMLENC H.264/H.265 编码器
- 注册 Amlogic 后端并扩展编码器自检
- 并行执行 MJPEG 解码与 AMLENC 编码
- 复用 NV12 缓冲区并移除冗余帧初始化
- 优化低延迟帧分发及 RTCP 关键帧恢复
- 动态调整 AMLENC 码率尚未完成，效果不佳

src/auth/middleware.rs

@@ -93,6 +93,11 @@ fn is_public_endpoint(path: &str) -> bool {
 fn is_setup_public_endpoint(path: &str) -> bool {
     matches!(
         path,
-        "/setup" | "/setup/init" | "/devices" | "/video/input-status" | "/stream/codecs"
+        "/setup"
+            | "/setup/init"
+            | "/devices"
+            | "/video/input-status"
+            | "/stream/codecs"
+            | "/video/codecs"
     )
 }