477bd693c1
tools/ingest_fundamental_raw.py read DART_API_KEY, but the Gitea Secret is registered as OPENDART_OPENAPI_KEY, and no workflow bridges the two (none currently invoke this script). Renamed the code side to match the secret name directly rather than adding a mapping layer, so whenever this gets wired into a workflow it just works. Updated the matching README setup instructions. Also includes the V9/V10 migration header explanations (why they were renamed from V003/V004) that were written earlier but missed from the previous commit's file list. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>