Implement local lifecycle operations

[nickbeau]

Detail: Support local process start, stop, restart, and process exit detection.

Milestone: Sprint 7: Local Process Runner

Source: docs/technical.md sprint plan.

[nickbeau]

I’m starting work on this now. I’ll inspect the local runner/release/instance pieces, implement the lifecycle operations with tests, then publish a PR linked back to this issue once the build and test suite are clean.