feat: add AI research chatbot with confirmed business tools

backend/app/schemas.py

@@ -123,6 +123,10 @@ class ResearchInput(Contract):
     _tags = field_validator("tags")(normalize_tags)
 
 
+class ResearchUpdate(ResearchInput):
+    version: int = Field(ge=1)
+
+
 def valid_ids(values):
     result = list(dict.fromkeys(values))
     if not result or len(result) > 100 or any(not re.fullmatch(r"[A-Za-z0-9_-]{1,100}", v) for v in result):
@@ -145,6 +149,16 @@ class BulkInput(Contract):
         return self
 
 
+class BulkUpdate(BulkInput):
+    versions: dict[str, int]
+
+    @model_validator(mode="after")
+    def check_versions(self):
+        if set(self.versions) != set(self.alpha_ids) or any(v < 1 for v in self.versions.values()):
+            raise ValueError("每个目标 Alpha 都必须提供当前版本")
+        return self
+
+
 class JobInput(Contract):
     kind: Literal["full_sync", "alpha_refresh", "pnl_refresh"]
     alpha_ids: list[str] = Field(default_factory=list)
@@ -161,6 +175,7 @@ class JobInput(Contract):
 
 class ResearchOutput(ResearchInput):
     updated_at: datetime
+    version: int
 
 
 class AlphaSummary(BaseModel):