fix(server): backfill delivered terminal claims (ADA-194)

[wizzoapp]

Fixes ADA-194 migration gap after #230.

Summary

• add idempotent migration 054 for local child lifecycles already terminal before migration 053
• require canonical per-child delivery evidence (matching parent system wake or wait-delivery tombstone) before inserting a satisfied claim
• bind terminal evidence and claimed event sequence to migration 053's durable cutoff so skip-level and crash-interrupted upgrades keep genuinely undelivered wakes recoverable
• preserve existing claims and exclude remote children

Verification

• regression seeds a pre-existing terminal child with no claim, runs the backfill, and observes exactly zero parent wakes across the initial boot plus 3 simulated restarts
• migration coverage includes completed/failed/killed/archived, idempotency, stale/live/remote exclusions, post-053 cutoff exclusions, and undelivered exclusions
• focused suite: 4/4 relevant tests passed; server typecheck and changed-file format/lint clean
• factory pre-commit gate: static checks plus clean Codex autoreview
• fresh SQLite backup from production (live DB untouched): integrity ok; 165 evidence-backed legacy claims inserted in 6.02s; root 8ebe24fb has 7/7 local children claimed; every named probe is claimed

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[chatgpt-codex-connector]

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[adamfgr]

Auto-approved by wizzo-approve: all policy conditions verified against HEAD f18a792.