fix: Add Python 3.14+ compatibility with Pydantic V2

Fixes incompatibility with Python 3.14+ where Pydantic V1's
compatibility layer (pydantic.v1) is not supported.

Changes:
- Update setup.py to require Pydantic V2 and pydantic-settings
  for Python 3.14+
- Add Python 3.12, 3.13, 3.14 to supported version classifiers
- Enhance import logic in types.py to raise clear error message
  when Pydantic V2 is not available on Python 3.14+
- Maintain backward compatibility with Python 3.8-3.13 supporting
  both Pydantic V1 and V2

The SDK now properly uses Pydantic V2 natively on Python 3.14+
while preserving existing behavior on earlier Python versions.

Author: zkleb-aai

assemblyai/types.py

@@ -1,3 +1,4 @@
+import sys
 from datetime import datetime
 from enum import Enum, EnumMeta
 from typing import (
@@ -24,7 +25,14 @@
 
     pydantic_v2 = True
 except ImportError:
-    # pydantic v1 import
+    # Python 3.14+ requires Pydantic V2
+    if sys.version_info >= (3, 14):
+        raise ImportError(
+            "Python 3.14 or greater requires Pydantic V2 and pydantic-settings. "
+            "Please install with: pip install 'pydantic>=2.0' 'pydantic-settings>=2.0'"
+        ) from None
+
+    # pydantic v1 import (fallback for Python < 3.14)
     from pydantic.v1 import UUID4, BaseModel, BaseSettings, ConfigDict, Field, validator
 
     pydantic_v2 = False

setup.py

@@ -21,7 +21,9 @@ def get_version() -> str:
     packages=find_packages(exclude=["tests", "tests.*"]),
     install_requires=[
         "httpx>=0.19.0",
-        "pydantic>=1.10.17",
+        "pydantic>=2.0; python_version>='3.14'",
+        "pydantic>=1.10.17; python_version<'3.14'",
+        "pydantic-settings>=2.0; python_version>='3.14'",
         "typing-extensions>=3.7",
         "websockets>=11.0",
     ],
@@ -42,6 +44,9 @@ def get_version() -> str:
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
+        "Programming Language :: Python :: 3.14",
     ],
     long_description=long_description,
     long_description_content_type="text/markdown",