Register proposal 0009 runtime realization

[SoundBlaster]

Summary

• What changed? Registered Proposal 0009 as runtime-realized by the existing TechSpec handoff signal runtime.
• Link related issue/task (if any): make next-move selected Proposal 0009 / runtime_realization.

Motivation

• Why is this change needed? The TechSpec handoff runtime, policy, and tests already exist, but Proposal 0009 was not represented in proposal_runtime_registry.json.
• What problem, gap, or user need does it address? Removes a stale game-master/runtime backlog item and lets the graph advance to the next proposal runtime gap.

Goals

• What should this PR achieve? Mark Proposal 0009 runtime, validation, and observation coverage as complete.
• What is intentionally out of scope? No new TechSpec artifact schema, no new Swift code, and no canonical spec mutation.

Changes

• Added Proposal 0009 to tools/proposal_runtime_registry.json with TechSpec handoff runtime, validation, and observation markers.
• Added a focused regression asserting Proposal 0009 has no remaining runtime next gap.

Validation

• Tests added/updated for changed behavior
• Local checks passed

Commands run:

python3 -m pytest -q tests/test_supervisor.py -k 'proposal_0009 or proposal_runtime_index or techspec_handoff'
git diff --check
make backlog
make next-move

Results:

• Focused tests: 5 passed, 606 deselected.
• Backlog after this slice: entry_count = 29, runtime_realization = 20.
• Next move advances from Proposal 0009 to Proposal 0011 / runtime_realization.
• Pre-commit hooks passed during commit.

Risks / Notes

• Backward compatibility impact: none; registry metadata and regression only.
• Migration/config changes required: none.
• Known limitations: the next proposal runtime backlog item is Proposal 0011.

Checklist

• PR title clearly describes the change
• Scope is focused and minimal
• Documentation updated (or N/A)
• No secrets or sensitive data added

[SoundBlaster]

Independent stack review from #390: no blocking findings. I checked the PR-local diff against its stacked base, verified the Proposal 0009 registry entry points at existing TechSpec handoff runtime/validation/observation markers, and confirmed the focused proposal runtime tests/checks are green in the stack context.

[SoundBlaster]

Independent stack review from #390: no blocking findings. I checked the PR-local diff against its stacked base, verified the Proposal 0009 registry entry points at existing TechSpec handoff runtime/validation/observation markers, and confirmed the focused proposal runtime tests/checks are green in the stack context.