chore: 144 - Log job execution finish

[Exohayvan]

Roadmap step

phase-1/step-144: Step 144 - Log job execution finish

Objective

Complete the selected roadmap step using only the programmatically selected step details.

Selected step

# Step 144 - Log job execution finish

## Source Checklist Item
- [ ] Log job execution finish.

## Goal
Record a durable local audit entry whenever a job execution reaches a terminal finish state. The finish log should make it possible to verify what ran, which node ran it, which manifest and lineage it belonged to, whether validation passed, and how contribution attribution should be preserved without inventing decentralization or later-phase behavior.

## Implementation Checklist
- [ ] Add a finish audit event emitted only when a job execution ends as completed, failed, cancelled, or validation-failed.
- [ ] Include stable identifiers: job ID, execution ID, creator node ID, worker node ID when available, manifest ID or path, and parent lineage reference when available.
- [ ] Include finish metadata: terminal status, finish timestamp, duration, validation receipt reference, output artifact references, and error summary when applicable.
- [ ] Preserve contribution attribution by recording the actor or node credited for the completed work and any validator identity used locally.
- [ ] Store the audit entry in the existing local audit log format without replacing or mutating prior start/progress entries.
- [ ] Ensure log writes are append-only and fail safely: a logging failure must be visible and must not silently mark the job as successfully audited.

## Required Tests Or Verification
- [ ] Run a successful local job and verify exactly one finish audit entry is appended.
- [ ] Run a failing local job and verify the finish audit entry records failure status and error summary.
- [ ] Verify the finish entry references the correct manifest, validation receipt, lineage, creator node ID, and contribution attribution fields.
- [ ] Verify repeated status checks do not create duplicate finish entries.

## Risks
- [ ] Duplicate finish logs could corrupt execution history.
- [ ] Missing validation receipt references could weaken local proof of useful work.
- [ ] Overwriting earlier audit entries could break lineage and attribution.

## Done When
- [ ] Every terminal job execution appends one complete local finish audit entry.
- [ ] Finish logs preserve manifest, validation, lineage, creator node ID, and attribution references.
- [ ] Tests prove success and failure paths are logged without duplicates.

Changes

371fae1 chore: complete phase-1 step-144
 src/aethermesh_core/local_audit_event.py |  70 +++++++++++++++++
 src/aethermesh_core/runtime_service.py   | 130 +++++++++++++++++++++++++++++++
 tests/test_local_audit_event.py          |   2 +-
 tests/test_runtime_service_api_cli.py    | 120 +++++++++++++++++++++++++++-
 4 files changed, 318 insertions(+), 4 deletions(-)

Validation

• PYTHONDONTWRITEBYTECODE=1 python3 scripts/full_test.py --mode fast --base origin/main --keep-going

Safety notes

• Roadmap selection was performed by the Python loop, not by the AI agent.
• No force push used.
• No hard reset used.
• Local automation paths are intentionally omitted.