revert pydantic ai update

Author: sentrivana

tox.ini

@@ -80,7 +80,7 @@ envlist =
     {py3.10,py3.12,py3.13}-pydantic_ai-v1.0.18
     {py3.10,py3.12,py3.13}-pydantic_ai-v1.24.0
     {py3.10,py3.12,py3.13}-pydantic_ai-v1.49.0
-    {py3.10,py3.13,py3.14}-pydantic_ai-v1.74.0
+    {py3.10,py3.13,py3.14}-pydantic_ai-v1.73.0
     {py3.10,py3.13,py3.14}-pydantic_ai-latest
 
 
@@ -475,8 +475,8 @@ deps =
     pydantic_ai-v1.0.18: pydantic-ai==1.0.18
     pydantic_ai-v1.24.0: pydantic-ai==1.24.0
     pydantic_ai-v1.49.0: pydantic-ai==1.49.0
-    pydantic_ai-v1.74.0: pydantic-ai==1.74.0
-    pydantic_ai-latest: pydantic-ai==1.74.0
+    pydantic_ai-v1.73.0: pydantic-ai==1.73.0
+    pydantic_ai-latest: pydantic-ai==1.73.0
     pydantic_ai: pytest-asyncio