Filling the gaps pt 2

[jsugg]

Summary

• complete tasks across runtime bring-up, plugin/runtime hardening, approvals dispatch, graph cleanup, maintenance scheduling, and operator docs.
• add profile-driven readiness/status contracts, structured activation/readiness events, and deterministic host service ordering with mirrored platform assets.
• introduce approval dispatch artifacts, hypermemory startup preflight + timeout stratification, stale Neo4j edge cleanup, and canonical plugin/degradation documentation.