findings of the reviews of audit stage 1

Technical review (Opus) and security review (Fable) of 9efc9c7..a59e3d4;
reports in the session's scratchpad. Fixed:

- B1 (verified bug): store.UpdateStatus read before writing in its
  transaction; a commit by another connection in between (the dmarc-ingest
  process opens the same file) failed it at once with "database is locked"
  and the delivery line was lost. The first statement is now a write.
- R3: a delivery line updated every row of its queue id and recipient; it
  now updates only the newest (Postfix reuses short ids). The sweep closes
  by row id (QueuedDelivery.ID, CloseUnreported(id)).
- R4: a contradicted sweep keeps a mark, reason "reconcile-contradicted",
  instead of losing which row it was.
- R1: contradicted cannot see a lost line (never read late). New counter
  reconcile_missed: at close, the sweep looks for the row's delivery line
  in mail.log and mail.log.1 (QueueLines). 0007 edited - it has run on no
  database but throwaway stands.
- R2: queued_over_lifetime cannot measure "what removing the sweep would
  leave" while the sweep runs; its text now says rows stuck despite the
  sweep, and the rule uses closed - missed - contradicted.
- cert-reload (R5, R6, R7, security medium/low): both files copied to .new
  and the copies checked as a pair before both are renamed; acts on the copy
  only when postconf says Postfix reads it; a failed reload is retried next
  pass; umask 077; says so when the mounted files cannot be read. The e2e
  case asserts Postfix reads the copy, the copy equals the mount, the key is
  600 root.
- Security low: a recipient with a quoted local part - the journal cut
  "a b"@x at the space, deliveryRe cut "a>b"@x at the ">" - matched no
  delivery line and was closed by the sweep. cleanAddress ends a bracketed
  address at the first ">" outside quotes; deliveryRe takes the recipient
  up to the ">, " before relay= (test fixtures given the relay= every real
  delivery line has).
- Security low: postqueue -p's error carries at most 512 bytes of output.
- Nits: addDeliveryLogDay refuses a column not on its list; the truncation
  test checks its message.
- To stage 2b (page wording, mockup-first): the history step of a bounced
  row says the receiving server refused it, false for a row the sweep
  closed. To the owner when stage 2b is reached: since M13 the "deferred"
  figure counts whole messages too, which "Connections turned away" would
  not name.

Found while verifying: the e2e's main positive path failed once with "553
not owned by user app1" - an smtpd idle from before the panel's reload took
the connection in the reload's second. Measured on the stand (one-off
probe, not committed): sending 0, 10, 40, 110 s after the save (two seconds
at the soonest) always met an smtpd started after the reload. The e2e now
waits for the sender map after each application it creates
(waitForSenderMap: AUTH, MAIL, RCPT, RSET - no message, no row), and the
level-1 case uses it instead of its own loop.

Docs: architecture § Queue reconcile, schema-migrations (rows 7 and 8,
chain head 8), CHANGELOG, audit plan (stage 1 note, the measured window,
a new stage 2b line: 62 lines), roadmap 15/62.

Evidence on the test server for this tree: go vet clean, go test ./... 23
packages ok, make e2e exit 0 (renewed certificate, hung panel, level 1 at
49/60).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

test/e2e/cert_reload_check.go

@@ -9,6 +9,7 @@ import (
 	"net"
 	"os"
 	"path/filepath"
+	"strings"
 	"time"
 )
 
@@ -68,7 +69,7 @@ func checkCertRenewalPickedUp(s *stack) error {
 	if want.Cmp(before) == 0 {
 		return fmt.Errorf("the renewed certificate has the old serial %s", before)
 	}
-	return waitFor("port 465 to present the renewed certificate", 30*time.Second, 500*time.Millisecond, func() (bool, error) {
+	if err := waitFor("port 465 to present the renewed certificate", 30*time.Second, 500*time.Millisecond, func() (bool, error) {
 		got, err := servedSerial()
 		if err != nil {
 			return false, err
@@ -77,5 +78,19 @@ func checkCertRenewalPickedUp(s *stack) error {
 			return false, fmt.Errorf("serial %s served, want %s", got, want)
 		}
 		return true, nil
-	})
+	}); err != nil {
+		return err
+	}
+	// The path that was broken is the one taken: Postfix reads the copy, and
+	// the copy is the renewed file, the key private to root.
+	out, err := s.execIn("selfpost", "sh", "-c",
+		"postconf -h smtpd_tls_cert_file && cmp /etc/postfix/tls/fullchain.pem /etc/postfix/tls-internal/fullchain.pem && "+
+			"cmp /etc/postfix/tls/privkey.pem /etc/postfix/tls-internal/privkey.pem && stat -c '%a %U' /etc/postfix/tls-internal/privkey.pem")
+	if err != nil {
+		return fmt.Errorf("Postfix's copy of the certificate: %v\n%s", err, out)
+	}
+	if !strings.Contains(out, "/etc/postfix/tls-internal/fullchain.pem\n") || !strings.Contains(out, "600 root") {
+		return fmt.Errorf("Postfix's copy of the certificate: %q, want Postfix reading it and the key 600 root", out)
+	}
+	return nil
 }