ga 0f9e0ce596 Sprint 7: race conditions + read_at + slog ... 1. chat.EnsureChat: ON CONFLICT DO UPDATE (race-safe) 2. chat.Send: tx.Begin/Commit (atomic INSERT message + UPDATE last_msg_at) 3. chat.MarkRead: добавил member-check (NOT a member -> 403) 4. chat.Message: +ReadAt field 5. migrations/0006: read_at column on messages 6. locations.Nearby: bounding-box prefilter + CTE (haversine только для отфильтрованных) 7. audit.Log: real metadata JSON passthrough (no more 'null' TODO) 8. main.go: slog JSON logger (был stdlib log) 9. WS: 'message_read' event от MarkRead 10. WS push: добавлены read/read_at/edited в message payload 11. Bumped v0.6.0		2026-08-20 21:04:56 +00:00
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main.go	Sprint 7: race conditions + read_at + slog	2026-08-20 21:04:56 +00:00