fix: strict has_subscription statements.

schemas/user.py

@@ -1,6 +1,6 @@
 from datetime import datetime
 
-from pydantic import BaseModel, Field, computed_field
+from pydantic import BaseModel, Field
 
 
 class SubscriptionData(BaseModel):
@@ -8,11 +8,7 @@ class SubscriptionData(BaseModel):
     expires_at: datetime | None = Field(None)
     addon_ids: list[str] = Field(default_factory=list)
     subscription_link: str | None = Field(None)
-
-    @property
-    @computed_field
-    def has_subscription(self) -> bool:
-        return all([self.devices, self.expires_at, self.subscription_link, self.addon_ids])
+    has_subscription: bool = Field()
 
 
 class UserInfo(BaseModel):