chore(main): release metis 1.6.0

[mpekatsoula]

🤖 I have created a release beep boop

1.6.0 (2026-09-07)

Features

• codegraph: build profiled graphs during initialization (#319) (a0d01a3)
• codegraph: reduce review input tokens (#300) (a26dfda)
• codegraph: strengthen deterministic reachability review (#296) (c7c2735)
• engine: add execution node foundation (#285) (c2bfb29)
• engine: improve scan execution, progress, and recovery (#309) (eaa5c71)
• execution: modularize execution graph (#290) (cafa73f)
• execution: support per-node LLM models (#310) (6cb0085)
• memory: add advisory git-history context (#283) (5925e4d)
• memory: apply threat-model context to review and triage (#282) (6153ea0)
• memory: initialize threat-model repository memory (#281) (49d6f5a)
• plugins: add AArch64 assembly .hs extension (#266) (e5320d7)
• plugins: add Perl language support (#318) (dee5432)
• prompts: externalize engine prompt resources (#284) (4d52b9d)
• Qdrant Vector Search (#291) (933ca31)
• runlog: add explainable workflow tracing for CLI and engine runs (#292) (ea6b4ed)
• stages: support external execution stages (3d94992)

Bug Fixes

• Fix: (403e1e1)
• checkpoints: preserve review checkpoint on transient write errors (#312) (e0d8dea)
• checkpoints: skip unparseable rows instead of discarding all (#313) (4263238)
• core: harden indexing, execution and persistence (#320) (bb9f12d)
• core: stabilize YAML configuration and execution contracts (#322) (4742297)
• engine: serialize review graph lazy initialization (#314) (ad7c127)
• keep llama.cpp embedding inputs as text (#317) (fa46783), closes #247
• plugins: restore Solidity manifest (#301) (36d495c)
• sarif: bound and validate external-stage reports (#325) (15271e1)
• triage: checkpoint per finding during parallel classification (#311) (985ad22)
• triage: stop repeated tool retries (#297) (eb74b70)

Documentation

• agents: add contributor guidance (#323) (541f94b)

---

This PR was generated with Release Please. See documentation.