Implement Phases 82 and 83

[pcharbon70]

Summary

• Harden conversation child-work startup so supervisor shutdown windows do not crash queued turn activation, and document the lifecycle contract.
• Add focused Phase 82 regression coverage for child-supervisor availability, queued activation, and the historical seeded conversation batch.
• Adopt :refactor into deterministic conversation routing, governed work resolution, runtime dispatch, memory workflow policy, result projection, and developer guidance.
• Add Phase 83 coverage for refactor routing, Refactorer conversation runtime dispatch, work-item conversation identity, and memory-backed refactor workflows.

Verification

• mix compile --warnings-as-errors
• mix test test/jido_code/conversations_coordinator_test.exs --max-cases 1 --max-failures 1
• mix test test/jido_code/conversations_driver_test.exs test/jido_code/conversations_coordinator_test.exs test/jido_code/conversations_test.exs test/jido_code/conversations_pubsub_test.exs test/jido_code/conversations/context_memory_test.exs --seed 871949 --max-cases 1 --max-failures 1
• mix test test/jido_code/phase_fifty_two_integration_test.exs test/jido_code/phase_eighty_three_integration_test.exs --max-cases 1 --max-failures 1
• mix test test/jido_code/memory_graph_workflow_service_test.exs --max-cases 1 --max-failures 1
• mix test test/jido_code/agent_workspace_test.exs --max-cases 1 --max-failures 1
• mix memory.verify

Notes

• bw prime and bw ready could not run in this checkout because bw is not installed.
• An exploratory over-broad mixed test command that combined the context-memory batch with Phase 52/83 tests hit the existing context-memory ETS cleanup race; the documented historical conversation batch and Phase 52/83 tests both pass when run as their intended verification groups.