v2.1.0 — HYATLAS_HOME runtime layout + multi-key LLM resilience

What's new in v2.1.0

• Runtime layout consolidation (HYATLAS_HOME). All runtime state now resolves under a single ~/.hyatlas root. New hyatlas config subcommands and migration helpers (hyatlas snapshot, hyatlas migrate layout).
• Multi-key LLM resilience. llm.api_keys list is probed at startup; the first working key wins. Falls back to llm.api_key for backward compatibility.
• Legacy deprecation warnings. hyatlas config show and hyatlas status warn when configs or data still live in legacy paths (~/.hy_memory, ~/.hermes/hy_memory.json).
• Config precedence: CLI flags > env vars > ~/.hyatlas/config/.env > ~/.hyatlas/config/hy_memory.json > legacy HERMES_HOME/hy_memory.json > ~/.hy_memory/pkg/.env.

See the full changelog in the repository for migration notes.