Drop Python 3.8 support or fix typing imports

[abrookins]

Problem

pyproject.toml claims Python 3.8 support (python = ">=3.8,<4.0"), but the code fails to import on Python 3.8:

from typing import Annotated  # ImportError on Python 3.8

Options

Option 1: Drop Python 3.8 (Recommended)

• Python 3.8 reached end-of-life in October 2024
• Update pyproject.toml to python = ">=3.9,<4.0"
• Remove Python 3.8 from CI matrix (already not tested)
• Clean approach for 1.0 release

Option 2: Fix imports for 3.8 compatibility

• Use from typing_extensions import Annotated with fallback
• More maintenance burden for an EOL Python version

Related

• redis-om 1.0.3b0: python 3.8 is still supported in pyproject.toml but typing fails #706 (original user report)

Recommendation

Drop Python 3.8 support for the 1.0 release. This is standard practice for a major release and Python 3.8 is EOL.