v1.6.0

Changelog

• d7ed406 v2 Phase 1a: golden stories + engine-owned oracles + phase-end conformance run (#281)
• c1de7f5 v2 Phase 1: conformance-first resequencing (ADR 0025 amendment) + v1 baseline (#278)
• fde5573 v2 Phase 1, item 6: instrument-costs — D9 calibration, v1 patches P-9..P-11, ADR 0027 (#277)
• 8e0bdbb v2 Phase 1, item 5.1: cost-latency — dependency-cache union image (#268) + paired-local (#266) (#270)
• 85c699a v2 Phase 1, item 5: target-v1-patch — P-1..P-7 and the discovery loop; both golden stories accepted (#267)
• 0649f51 feat(benchmark): adapter-v1 — the v1-as-patched target adapter (Phase 1, item 4) (#264)
• 1ede9f8 feat(benchmark): runner-core — execution engine, suite orchestration, CLI (Phase 1, item 3) (#263)
• c175231 feat(benchmark): fixtures — pinned golden-fixture repos + first three stories (Phase 1, item 2) (#262)
• 4f4160b feat(benchmark): runner-skeleton — standalone module with core contracts (Phase 1, item 1) (#261)
• 345b1f6 docs(v2): flip Phase 1 plan and index to live — missed lifecycle step from #259 (#260)