Refactor 'last_danmaku_time' initialization order in ws-server.py

The initialization of 'last_danmaku_time' is moved down right after the live stream starts instead of being at the start of '_main' function. This will ensure that the value of 'last_danmaku_time' reflects more accurately the start of the live stream, helping with more precise time tracking.

Signed-off-by: hldh214 <hldh214@gmail.com>

recorder/danmaku/douyin/ws-server.py

@@ -181,8 +181,6 @@ async def consumer_handler(websocket):
 
 
 async def _main(room_id, interval):
-    global last_danmaku_time
-    last_danmaku_time[room_id] = datetime.datetime.now()
     logging.info(f'Started danmaku subscriber: {room_id}')
 
     while True:
@@ -193,6 +191,8 @@ async def _main(room_id, interval):
             continue
 
         logging.info(f'Live started: {room_id}')
+        global last_danmaku_time
+        last_danmaku_time[room_id] = datetime.datetime.now()
         hook_result = asyncio.Future()
         task = asyncio.create_task(get_raw_js(hook_result))
         try: