fix: add field validation to CardQuery model for proper 422 responses (Closes stayforge/Stayforge_Networks_Access#9)

CardQuery.number was a plain str with no constraints, so invalid input
(e.g., overly long strings) would pass validation and hit the database,
returning 404 instead of 422. Added max_length=128, min_length=1, and
alphanumeric pattern validation to match CardModel constraints.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: 2 people

src/card.py

@@ -96,7 +96,7 @@ def remove_created_at(cls, values: dict) -> dict:
 
 
 class CardQuery(BaseModel):
-    number: str = Field(..., description="Card number to be queried")
+    number: constr(min_length=1, max_length=128, pattern="^[a-zA-Z0-9]+$") = Field(..., description="Card number to be queried")
 
 
 class CardResponse(CardModel):