chore: 146 - Log validation receipt creation

[Exohayvan]

Roadmap step

phase-1/step-146: Step 146 - Log validation receipt creation

Objective

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

Selected step

# Step 146 - Log validation receipt creation

## Source Checklist Item
- [ ] Log validation receipt creation.

## Goal
Record every validation receipt creation event in a local audit log so a runnable prototype can prove when validation happened, which node created the receipt, what manifest or work artifact was validated, and how lineage and contribution attribution were preserved. The log must support honest replay/debugging without implying production security, rewards, or decentralization.

## Implementation Checklist
- [ ] Add a local audit log event for validation receipt creation only.
- [ ] Include timestamp, event type, receipt ID, creator node ID, validated manifest ID or path, validation result, and validation command or validator name.
- [ ] Include lineage references needed to trace the receipt back to the submitted work item, manifest, and prior receipt when present.
- [ ] Include contribution attribution fields already available at receipt creation time, without inventing missing identities.
- [ ] Write audit entries append-only in the prototype’s existing local data/log location.
- [ ] Ensure audit logging failure fails the receipt creation flow or clearly marks the receipt as not fully persisted.
- [ ] Avoid adding dashboards, networking, rewards, tokenomics, or later-phase trust claims.

## Required Tests Or Verification
- [ ] Create a validation receipt locally and confirm exactly one audit entry is appended.
- [ ] Verify the audit entry contains creator node ID, manifest reference, validation result, lineage reference, and contribution attribution.
- [ ] Verify failed or invalid validation attempts do not create misleading successful receipt logs.
- [ ] Verify repeated receipt creation appends new entries without overwriting earlier audit history.

## Risks
- [ ] Audit logs may drift from receipt contents if fields are duplicated inconsistently.
- [ ] Missing creator node ID or manifest references can break lineage.
- [ ] Logging success before durable receipt creation can create false evidence.

## Done When
- [ ] Every validation receipt creation produces a local, append-only audit log entry with enough metadata to trace validation, lineage, and attribution.

Changes

b45b49d chore: complete phase-1 step-146
 docs/local-audit-event-schema.md         |   6 +-
 src/aethermesh_core/local_audit_event.py |  56 +++++++++++++++
 src/aethermesh_core/runtime_service.py   |  77 ++++++++++++++++++++
 tests/test_local_audit_event.py          |   2 +-
 tests/test_runtime_service_api_cli.py    | 116 +++++++++++++++++++++++++++++++
 5 files changed, 255 insertions(+), 2 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.