NFI Backtest Engine v1.4.0-rc.1

NFI Backtest Engine v1.4.0

v1.4.0 closes the latest-NFI Native exact gap and makes continuous compatibility
qualification operational on both Spot and Futures.

Highlights

• Proves the latest Signal 65 callback/tag transition with previous/latest official
  Freqtrade and latest Native executions.
• Requires changed-source coverage, trade-surface equality, and full-state equality
  before a strategy revision reaches quick_verified.
• Compiles supported callback, tag, route, threshold, Grind, and trade-state behavior
  into generic source-derived state-machine IR without version-specific runtime
  patches.
• Runs four-hour Spot/Futures qualification with digest-bound compact fixtures,
  append-only evidence, deduplicated issues, and a visible official fallback.
• Skips expensive deep discovery only when both modes are already exact; missing or
  incomplete qualification remains fail-closed and enters the bounded discovery lane.
• Uses portable container ownership discovery and bounded diagnostics without fixed
  image usernames or UIDs.

Certification boundary

This is a product release, not a new combined Full X7 certification. The five-year
Spot certificate remains bound to v1.0.0 and the five-year Futures certificate
remains bound to v1.1.0. v1.4.0 wheels are built once, exercised with exact Spot and
Futures fixtures on Linux, Windows, and macOS, checksum-sealed, and promoted from RC
to stable without rebuilding.

Upgrade

Run the normal installer again. It selects the v1.4.0 wheel for the current supported
platform, verifies the published SHA-256 digest, and replaces the isolated nfi-bte
tool installation.

See the
v1.4.0 changelog
for the complete release summary.