feat: backfill missing PnL for submitted alphas

backend/app/schemas.py

@@ -187,7 +187,7 @@ class BulkUpdate(BulkInput):
 
 
 class JobInput(Contract):
-    kind: Literal["full_sync", "daily_sync", "alpha_refresh", "pnl_refresh", "self_correlation"]
+    kind: Literal["full_sync", "daily_sync", "alpha_refresh", "pnl_refresh", "pnl_backfill", "self_correlation"]
     alpha_ids: list[str] = Field(default_factory=list)
     submission: Submission | None = None
     date_from: date | None = None
@@ -195,7 +195,10 @@ class JobInput(Contract):
 
     @model_validator(mode="after")
     def validate_ids(self):
-        if self.kind in ("full_sync", "daily_sync"):
+        if self.kind == "pnl_backfill":
+            if self.alpha_ids or self.submission is not None or self.date_from is not None or self.date_to is not None:
+                raise ValueError("检查 PnL 自动覆盖全部本地已提交 Alpha，不接受 ID、分组或日期范围")
+        elif self.kind in ("full_sync", "daily_sync"):
             if self.alpha_ids:
                 raise ValueError("列表同步不接受 Alpha ID")
             if self.kind == "full_sync":