v0.1.1-beta.4

fix(agent): stabilize SOP confirmation state transitions

- prevent continue_active routing from regressing the active SOP step
- persist and consume awaiting-input state for explicit user questions
- isolate awaiting-input context across task switches
- recover sessions when published SOP nodes are removed or renamed
- preserve active task identity during confirmation and step recovery
- add regression coverage for confirmation loops and invalid transitions

Tests: 589 passed