feat(backend): add market metadata storage and outcomes extension

app/schemas/dtos.py

@@ -28,13 +28,15 @@ class LedgerEntryDTO(BaseModel):
     related_market: Optional[str] = None
     created_at: datetime
 
-class CreateMarketRequest(BaseModel):
+class CreateMarketMetadataRequest(BaseModel):
+    market_address: str
+    question_id: str
     title: str
     description: Optional[str] = None
-    category: str = "Crypto"
-    tier: int = 1
+    category: str = "Others" # 默认 Others，支持用户自定义
+    outcomes: List[str] = Field(..., min_length=2, max_length=255) # 支持最多 255 个选项
     resolution_time: datetime
-    outcomes: List[str] = Field(..., min_length=2, max_length=8)
+    creator: str
 
 class MarketDTO(BaseModel):
     market_address: str
@@ -50,10 +52,15 @@ class MarketDTO(BaseModel):
     resolution_time: datetime
     created_at: datetime
 
+class ResolveMarketRequest(BaseModel):
+    market_address: str
+    question_id: str
+    winning_outcome_index: int = Field(..., ge=0, le=255)
+
 class CreateOrderRequest(BaseModel):
     market_address: str
     vault_address: Optional[str] = None
-    outcome_index: int = Field(..., ge=0, le=7)
+    outcome_index: int = Field(..., ge=0, le=255)
     side: str = Field(..., pattern="^(BUY|SELL)$")
     amount: Decimal = Field(..., gt=0)
     price: Optional[Decimal] = None