feat(api): revert dpr breaking change

Author: stainless-app[bot]

.stats.yml

@@ -1,4 +1,4 @@
 configured_endpoints: 48
-openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/imagekit-inc%2Fimagekit-e5b5a158784fff63311ceef956e8d5ce9e87c6b557d23ab737270040eb39adcd.yml
-openapi_spec_hash: b0293985a8806f367319af573d1b418c
+openapi_spec_url: https://storage.googleapis.com/stainless-sdk-openapi-specs/imagekit-inc%2Fimagekit-83a7f3659a437113f2a79e1e72794be19eff00ec232fd0206198c80364ccfebf.yml
+openapi_spec_hash: b327552548ab641eb4ea3b45e643dfce
 config_hash: 47cb702ee2cb52c58d803ae39ade9b44

src/imagekitio/types/shared/transformation.py

@@ -191,7 +191,7 @@ class Transformation(BaseModel):
       [Distort effect](https://imagekit.io/docs/effects-and-enhancements#distort---e-distort).
     """
 
-    dpr: Union[float, str, None] = None
+    dpr: Optional[float] = None
     """
     Accepts values between 0.1 and 5, or `auto` for automatic device pixel ratio
     (DPR) calculation. Also accepts arithmetic expressions.

src/imagekitio/types/shared_params/transformation.py

@@ -189,7 +189,7 @@ class Transformation(TypedDict, total=False):
       [Distort effect](https://imagekit.io/docs/effects-and-enhancements#distort---e-distort).
     """
 
-    dpr: Union[float, str]
+    dpr: float
     """
     Accepts values between 0.1 and 5, or `auto` for automatic device pixel ratio
     (DPR) calculation. Also accepts arithmetic expressions.