v2.0.0 introduction of governed execution architecture

This release marks the beginning of Robson v2.

Robson transitions from an execution-focused system into a governed execution runtime. The core change is not additional automation, but the introduction of an explicit execution layer that binds decision, risk, approval, audit, and recovery into a single controlled lifecycle.

This change introduces what was previously missing: the execution glue.

Key shifts:

• Execution becomes a governed lifecycle through QueryEngine
• Risk acts as a blocking gate, not advisory logic
• Operator approval becomes a formal state transition
• EventLog, projections, and recovery are tightened into a coherent path
• Execution is treated as a first-class runtime concern

Robson does not generate signals. It governs what happens after a trading decision exists.

For architectural context:
https://rbxsystems.ch/blog/2026-04-05-robson-v2-finds-its-missing-execution-glue