fix: fetch dataset scope options from WorldQuant platform

backend/app/catalog/contracts.py

@@ -16,29 +16,15 @@ def utc_timestamp(value: datetime) -> datetime:
 UTCTimestamp = Annotated[datetime, AfterValidator(utc_timestamp)]
 
 
-# Supported research scopes, not an assertion about a connected account's permissions.
-UNIVERSES = {
-    "USA": ["TOP3000", "TOP1000", "TOP500", "TOP200"],
-    "CHN": ["TOP2000"],
-    "EUR": ["TOP2500", "TOP1200"],
-    "ASI": ["TOP1000"],
-    "GLB": ["TOP3000"],
-    "JPN": ["TOP1600"],
-    "HKG": ["TOP800"],
-}
+# Platform membership is checked before synchronization, not while reading historical caches.
+ScopeName = Annotated[str, Field(min_length=1, max_length=100, pattern=r"^[^|\s]+$")]
 
 
 class Scope(Contract):
-    instrument_type: Literal["EQUITY"] = "EQUITY"
-    region: str
-    universe: str
-    delay: int = Field(ge=0, le=1)
-
-    @model_validator(mode="after")
-    def valid_scope(self):
-        if self.universe not in UNIVERSES.get(self.region, []):
-            raise ValueError("不支持的 Region / Universe 组合")
-        return self
+    instrument_type: ScopeName = "EQUITY"
+    region: ScopeName
+    universe: ScopeName
+    delay: int = Field(ge=0)
 
     def key(self):
         return f"{self.instrument_type}|{self.region}|{self.universe}|{self.delay}"