07-backup-architecture.md 6.3 gains a dated [DESIGN] paragraph on replay ->
rollback -> hold, including why no engine flag closes it: --single-transaction
makes Postgres atomic, MariaDB DDL is not transactional, so the rollback is the
fix and the flag is a belt.
Drill record for the live walk, including the TWO defects the walk found in the
fix itself (a rollback into a re-created container; an operator route that
cleared the file while the running controller kept refusing) and the ONE
red-proof that PASSED, which is reported rather than omitted.
R-379..R-382 compressed into CLOSED-ITEMS.md. OPEN-ITEMS 330683 -> 325236 bytes.
STATUS.md restates the outcome and names the next operator step.
