feat: new endpoints for users and updated models

app/models/server/playtime.py

@@ -0,0 +1,17 @@
+from pydantic import BaseModel
+from datetime import datetime
+from typing import Optional
+
+class PlayerSession(BaseModel):
+    player_id: str
+    player_name: str
+    server_ip: str
+    start_time: datetime
+    end_time: Optional[datetime] = None
+    duration: Optional[int] = None  # в секундах
+    
+class PlayerPlaytime(BaseModel):
+    player_id: str
+    player_name: str
+    total_time: int  # общее время в секундах
+    last_coins_update: datetime  # последнее время начисления монет