feat(migrate-prod): prod → multiplayer migration (ETL + plan + runbook)#79

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cevian wants to merge 11 commits into

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prod-multiplayer-migration

Commits on Jun 25, 2026

feat(migrate-prod): add prod → multiplayer migration ETL + plan

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docs(migrate-prod): add prod cutover runbook

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refactor(migrate-prod): two source DBs → a new target DB (not in-place)

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feat(migrate-prod): §9 prod survey + map service users → owner agents

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docs(migrate-prod): commit runbook to the maintenance-window approach

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docs(migrate-prod): clarify the target DB is self-provisioned by the ETL

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feat(migrate-prod): engine allow-list for rehearsal/smoke test

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feat(migrate-prod): add verify.ts (read-only §5 reconciliation)

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perf(migrate-prod): batch the memory copy (unnest, ~500/insert)

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docs(migrate-prod): record measured rehearsal timing (~15 min remote)

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fix(migrate-prod): adapt to main (better-auth sessions, content_version rename)

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