Add Lock post endpoint

(allows manual locking through API)

closes #10018

freqtrade/rpc/api_server/api_schemas.py

@@ -1,7 +1,7 @@
 from datetime import date, datetime
 from typing import Any, Dict, List, Optional, Union
 
-from pydantic import BaseModel, RootModel, SerializeAsAny
+from pydantic import AwareDatetime, BaseModel, RootModel, SerializeAsAny
 
 from freqtrade.constants import IntOrInf
 from freqtrade.enums import MarginMode, OrderTypeValues, SignalDirection, TradingMode
@@ -378,6 +378,13 @@ class Locks(BaseModel):
     locks: List[LockModel]
 
 
+class LocksPayload(BaseModel):
+    pair: str
+    side: str = '*'  # Default to both sides
+    until: AwareDatetime
+    reason: Optional[str] = None
+
+
 class DeleteLockRequest(BaseModel):
     pair: Optional[str] = None
     lockid: Optional[int] = None