Python 3.14 incompatibility due to Pydantic V1 usage

[dannyob]

The library fails to import on Python 3.14 because it uses from pydantic import v1 as pydantic in resource.py and pagination.py. Pydantic's V1 compatibility layer doesn't support Python 3.14+.

UserWarning: Core Pydantic V1 functionality isn't compatible with Python 3.14 or greater.
  from pydantic import v1 as pydantic  # type: ignore

pydantic.v1.errors.ConfigError: unable to infer type for attribute "previous"

The fix would be migrating to native Pydantic V2 APIs. See pydantic/pydantic#9948 for context on the V1 shim being dropped for 3.14.

Tested with Python 3.14.2, pydantic 2.12.5, replicate 1.0.7.