wangdl 7f79802e0a docs: update V2 architecture to reflect DOC-FULL-001~006 changes
- ReadingMaterialRef → ReadingMaterialRefV2 (full fields, camelCase)
- ReadingSessionV2: add closed_at_ms, Interrupted/Failed statuses
- EventBuffer: add reload_stale_events_v2, buffer_size_v2
- V1/V2 diff table: add session status/recovery rows
- Verification chain: add startup recovery + V2 MaterialRef

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-06-11 21:10:58 +08:00
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