feat(harness-state): map OpenCode events to v3

agent-identity: dev3.direct.omp.9exwnk6h
agent-persona: generalist
agent-supervisor: unavailable
agent-tool: OMP
agent-tool-version: 18.1.7
agent-runtime: OMP 18.1.7
tooling-profile: dotfiles@931583a

Author: schickling-assistant