feat: StartOffset

- 实现startOffset
- 修复EndOffset = 0 + 循环播放时，音乐会大量重复播放的错误。
- 增加数据校验和 BeatClock 联动。StartOffset不正确时停止bar+级 callback。
- BeatClock 现在会在每次重新播放时重启，以解决EndOffset配置错误被舍弃时，拍子对不上的问题。

Assets/Scripts/OCES/Audio/HandWritten/LongAudio/ChannelFader.cs

@@ -44,12 +44,12 @@ namespace OCES.Audio
             CurrentContainerId = containerId;
             CurrentVolume      = startVolume;
             CurrentHandle      = this.m_player.Play(containerId);
-            Debug.Log($"[ChannelFader] StartNew: containerId={containerId}, CurrentHandle={CurrentHandle}");
+            //Debug.Log($"[ChannelFader] StartNew: containerId={containerId}, CurrentHandle={CurrentHandle}");
         }
 
         public void StopCurrent()
         {
-            Debug.Log($"[ChannelFader] StopCurrent called! CurrentHandle={CurrentHandle}, stack=\n{Environment.StackTrace}");
+            //Debug.Log($"[ChannelFader] StopCurrent called! CurrentHandle={CurrentHandle}, stack=\n{Environment.StackTrace}");
             StopHandle(CurrentHandle);
             CurrentHandle      = null;
             CurrentContainerId = 0;
@@ -79,10 +79,14 @@ namespace OCES.Audio
             }
 
             if (transition?.FadeOutTime > 0f )
+            {
                 yield return this.m_coroutineHost.StartCoroutine(
                     FadeOut(outgoingHandle, outgoingVolume, transition.FadeOutTime));
+            }
             else
+            {
                 StopHandle(outgoingHandle);
+            }
         }
 
         /// <summary>
@@ -167,7 +171,7 @@ namespace OCES.Audio
 
         IEnumerator FadeOut(ContainerPlayHandle handle, float fromVolume, float duration)
         {
-            //Debug.Log($"Fading out in {duration} seconds.");
+            // Debug.Log($"Fading out in {duration} seconds.");
             if (handle == null || handle.Cancelled) yield break;
 
             float elapsed = 0f;
@@ -202,10 +206,13 @@ namespace OCES.Audio
                 if (src) src.volume = 0f;
 
             StopHandle(handle);
+            
+            // Debug.Log($"[ChannelFader] Faded out in {duration} seconds.");
         }
 
         IEnumerator FadeIn(ContainerPlayHandle handle, float duration)
         {
+            // Debug.Log($"Fading in in {duration} seconds.");
             if (handle == null || handle.Cancelled) yield break;
 
             List<AudioSource> sources = new();
@@ -242,8 +249,8 @@ namespace OCES.Audio
                 if (src) src.volume = 1f;
 
             CurrentVolume = 1f;
+            
+            // Debug.Log($"[ChannelFader] Faded in in {duration} seconds.");
         }
-        
-
     }
 }