Mint EIA vented and flared series identity

[MaxGhenis]

Summary

• mint Chronicle UUID 52011655-2184-4c46-9f22-a97d5db88959 for the U.S. annual EIA N9040US2 natural-gas vented-and-flared series
• define the identity as annual million_cubic_feet for U.S. country geography
• document that the mutable DNav workbook refreshes monthly and that only an authenticated annual row can establish an observation
• regenerate the canonical series catalog and update its reviewed identity-map anchor

This is the Chronicle identity prerequisite for the Thesis FLARE Act context-series admission. It records no retrospective observation and makes no first-print-custody claim.

Official source: https://www.eia.gov/dnav/ng/hist/n9040us2a.htm

Append-only proof

• all 250 registry lines from codex/thesis-ledger-facts@44270c802f53fe3a8abedeb924f5cf0ed78b2449 remain a byte-identical prefix
• one generated mint event is appended
• no existing registry line is rewritten
• generated catalog: 219 series, 190,855 bytes, SHA-256 92f51a2181d0b26276e59fda6309bd8f849dc1f2050c26ddb38d9f6ad392082a

Verification

• uv run --locked python scripts/build_series_catalog.py --check
• uv run --locked python scripts/build_series_catalog.py --verify-registry-append-only <base registry>
• uv run --locked pytest -q tests/test_build_series_catalog.py: 155 passed
• uv run --locked pytest -q: 938 passed, 16 skipped, 5 xfailed
• uv run --locked ruff check .: clean