Zeus Agent v6.0.0

v6.0.0 - Higher-Order Zeus Agent OS

• Adds Higher-Order Agent OS runtime aggregating persona, Objective Compiler Workflow, governed live connectors, TUI cockpit contract, recursive improvement review, plugin skeleton, remote sandbox contract, tenant/auth contract, eval dashboard contract, persistent audit contract, and public production boundary.
• Adds zeus higher-order-agent-os and ZeusAgent.higher_order_agent_os(...).
• Keeps remote sandbox, multi-user hosted mode, unattended execution, unrestricted production live execution, and automatic memory promotion disabled by default.

Validation:

• PYTHONPATH=src python3 -m pytest -q -> 1504 passed
• python3 -m compileall -q src tests -> passed
• git diff --check -> passed
• python3 -m build -> built sdist and wheel