Record concurrent store release test

contrib/testing/queue-store-concurrency-check.sh

@@ -77,6 +77,7 @@ if ! $as_root "$admin_tool" user list | grep -Fx "$user" >/dev/null; then
     $as_root "$admin_tool" user add "$user" >/dev/null
 fi
 
+$as_root /usr/bin/systemctl daemon-reload
 $as_root /usr/bin/systemctl start "$service"
 wait_services
 

docs/release-testing-0.7.md

@@ -111,7 +111,7 @@ inputs and outputs is absent from the ZIP.
 | STQ-03 | Queue free-space calculation is correct on 32/64-bit and reserves space | [PASS](test-evidence/0.7-r1.md#stq-03) |  |  |
 | STQ-04 | Full-disk and unreadable-spool failures defer safely without mail loss | [PASS](test-evidence/0.7-r1.md#stq-04) |  |  |
 | STQ-05 | Retry, expiry, bounce, listing, hold/release, and deletion | [PASS](test-evidence/0.7-r1.md#stq-05) |  |  |
-| STQ-06 | Concurrent delivery/read/move/delete/restart preserves integrity |  |  |  |
+| STQ-06 | Concurrent delivery/read/move/delete/restart preserves integrity | [PASS](test-evidence/0.7-r1.md#stq-06) |  |  |
 | STQ-07 | Backup/export and restore reproduce mail, metadata, contacts, calendars |  |  |  |
 | STQ-08 | Invalid commands, oversized lines, and unauthorised access fail safely |  |  |  |
 | STQ-09 | Per-user mail quota excludes contacts/calendars and atomically blocks concurrent growth |  |  |  |

docs/test-evidence/0.7-r1.md

@@ -1579,3 +1579,44 @@ All temporary Queue entries were removed. The intentionally retained DSN is
 local release evidence; no external mail, SMTP relay, collector source, or
 LMTP endpoint was used. Bongo finished active/running as manager PID 1253396
 with systemd result `success`.
+
+## STQ-06
+
+Result: **PASS**
+
+Commit `6ab16588` added an installed Store concurrency diagnostic and its
+systemd coordinator. The diagnostic creates deterministic messages in Queue
+999 and records the SHA-256 digest of every Queue-owned message. Separate
+threads then deliver through `QADDM`, read message bodies, move selected
+objects, and delete selected objects. The coordinator restarts the real Bongo
+service after the first eight deliveries while the Store threads remain
+active; the remaining 16 held Queue entries must survive and deliver after
+reconnection.
+
+The complete rebuilt suite passed 86 of 86 tests in 11.41 seconds. The
+storetool test group also covers the fixture marker and the deterministic
+move/delete policy. The commit was pushed to `master`, installed as
+`mail-mta/bongo-9999::bongo` with GCC 15.3.0, and exercised twice on
+2026-07-23. The clean evidence run was:
+
+```sh
+./contrib/testing/queue-store-concurrency-check.sh
+```
+
+```text
+STQ-06 PASS delivered=24 reads=22 moves=10 deletes=5 transient-reconnects=445 restart=1
+```
+
+The five messages numbered as deletion targets were absent. Each of the
+other 19 messages existed exactly once, in INBOX or `/mail/STQ06` according
+to the test policy, and matched its pre-delivery Queue digest. Ten messages
+were moved successfully. The reader observed 22 distinct messages, including
+short-lived objects before concurrent deletion, without a content mismatch.
+The reported transient reconnect attempts occurred only while the deliberate
+service restart made the Store unavailable; every worker recovered.
+
+The diagnostic removed all 24 test messages and every held Queue entry.
+Post-test listings of Queue, `stq06` INBOX, and `/mail/STQ06` were empty.
+No external mail, SMTP relay, collector source, or LMTP endpoint was used.
+Bongo finished active/running as manager PID 1264348 with systemd result
+`success`.