dikw-core v0.6.3

0.6.3 — delivery-loop instrumentation (no engine changes)

Changed

• Cadence release — no shipped-engine change. The published wheel is
  byte-identical to 0.6.2; src/ is untouched, so every runtime behavior, on-disk
  format, database schema, and CLI surface is unchanged. The delta lives entirely in
  the repo's own maintainer-facing delivery loop (neither shipped in the wheel nor
  user-facing): a resumable-STATE + PR-receipt artifact convention for the delivery
  workflow, and a new tools/loop_metrics.py that reads the accumulated PR-body
  receipts plus the GitHub API to report the loop's own effectiveness
  (first-pass-green rate, escape rate, codex rounds). The bump keeps the GHCR image,
  the pip pin, and the docs in lockstep with the tag.