Add memory conflict review workflow

[macayu17]

Summary

• preserve memory revisions before automatic replacements
• route ambiguous contradictions into pending conflict proposals
• add transactional conflict resolution and dashboard review controls

Why

Engram previously replaced selected memories in place when reconciliation returned UPDATE, which could silently erase a still-valid durable claim. This keeps clear corrections automatic while holding genuine conflicts out of retrieval until the user resolves them.

Impact

Unresolved proposals remain pending and excluded from approved-only retrieval. Users can accept the new claim, keep the current claim, or keep both from the Memories dashboard. No Azure, Docker, deployment, model, or environment configuration changes are included.

Validation

• F:\Engram\.venv\Scripts\python.exe -m pytest api -q (162 passed, 3 skipped)
• npm run typecheck
• npm run verify:logic
• npm run verify:conflicts
• npm run build
• docker compose config --quiet

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Project	Deployment	Actions	Updated (UTC)
engram	Ready	Preview, Comment	Jul 18, 2026 2:30pm

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