refactor: Fix some type error (#22594)

Signed-off-by: -LAN- <laipz8200@outlook.com>

api/models/account.py

@@ -196,7 +196,7 @@ class Tenant(Base):
     __tablename__ = "tenants"
     __table_args__ = (db.PrimaryKeyConstraint("id", name="tenant_pkey"),)
 
-    id = db.Column(StringUUID, server_default=db.text("uuid_generate_v4()"))
+    id: Mapped[str] = db.Column(StringUUID, server_default=db.text("uuid_generate_v4()"))
     name = db.Column(db.String(255), nullable=False)
     encrypt_public_key = db.Column(db.Text)
     plan = db.Column(db.String(255), nullable=False, server_default=db.text("'basic'::character varying"))