Prepare aoa-techniques v0.5.0 release

[8Dionysus]

What changed

• prepare the public technique corpus for v0.5.0
• reconstruct the complete release notes from all 37 first-parent commits since v0.4.5, including the 31 commits that never touched the prior changelog
• update the public release marker and both release-marker guard tests
• rebuild the repository-doc companions and canonical repo-local KAG index family

Why

The existing Unreleased section covered only part of the actual landed delta. This release note is based on the tagged Git range, the 366-path source diff, commit bodies, owner surfaces, and generated contracts. It includes an exact ordered 37-of-37 commit inventory so the public release cannot silently omit work that bypassed CHANGELOG.md.

Impact

v0.5.0 publishes the manifest-owned validation topology, bounded memo/eval/KAG/stats ports, hardened KAG artifact admission and canonical repository index family, plus the correctness and public-hygiene fixes landed since v0.4.5. It does not claim skill runtime, proof, routing, memory, KAG-substrate, cross-owner stats, or package-registry authority.

Validation

• exact 37-of-37 first-parent inventory parity against v0.4.5..e45b41f
• complete 366-path diff accounting: 98,241 additions and 22,697 deletions
• full release lane, including 249 root tests and all 15 mechanic test homes
• source/generated parity and public hygiene
• OS Abyss KAG export artifact trust gate: allow
• repo-local KAG full, incremental, family, and event-history parity
• diff hygiene and clean post-check snapshot

Generated parity and remaining risk

All changed generated surfaces were rebuilt from authored sources. The release remains a tagged public corpus and GitHub Release; no package registry publication is in scope.