docs(release): record public 0.3.0 closeout

[ohmiler]

Summary

• record the immutable GitHub, PyPI, and npm publication evidence for 0.3.0
• archive WORK-044 and update project state, roadmap, risks, and release readiness
• retain the accepted live-routing evidence gap and remaining platform/signing limitations

Verification

• python -m solodeveling_protocol.cli . (passed)
• focused release/memory suite: 53 passed
• git diff --check (passed)

Scope

Documentation and Solodeveling project memory only. Publication is already complete; this PR performs no release or registry action.