Closes#2
Removes hardcoded bearer token from db_calls.py and .claude/ops-rework/check_prod_missing_ratings.py.
Both files now call load_dotenv() and read PD_API_TOKEN from the environment.
The .env file (already gitignored) already contains the PD_API_TOKEN key.
Added python-dotenv>=1.0.0 to pyproject.toml dependencies.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>