release: 1.9.2: Review pass: port-25 milters, DMARC validation, rate-limit fix

Review pass over `1.4.0`…`1.9.1`: port 25 no longer shares the submission milter chain, DMARC reports are validated before they are stored, and the auto rate limit is correct for a non-default level-1 window. Schema migration `0010` (index only). Upgrading is a tag bump.
Added:
  - SQLite migration `0010_send_log_app_login_index.sql` —
  - DMARC aggregate reports are accepted as **zip** as well as gzip or plain XML
  - e2e: `checkPort25ConfigCombinations` regenerates the Postfix configuration
Changed:
  - README hero line and a **Positioning** block in `docs/product.md` record the
Fixed:
  - The setup account's password is hashed at bcrypt cost `12` like every other
  - Login/setup rate limiter: protecting blocked buckets from eviction is now
  - `postqueue -p` output is bounded to 4 MiB (the timeout alone left the size of
  - [schema-migrations.md](docs/schema-migrations.md): the schema section was
  - postqueue reader is now time-bounded: `postqueue -p` runs under a 5-second
  … (11 more in CHANGELOG)
Changed:
  - [roadmap.md](docs/roadmap.md) now carries everything the 2026-08-19 code
  - Extracted `internal/configsafe` — the empty-value and forbidden-character
  - Build, deploy and migration comments no longer cite the archived
  - Dropped the `parseDomainRateLimitForm` / `parseAppRateLimitForm` pass-through
  - Extracted shared helpers: `internal/atomicfile` (atomic temp-write+rename) and
  … (7 more in CHANGELOG)
Removed:
  - Unused legacy asset `docs/assets/icon.png` (superseded by the four brand SVGs
  - Plan documents for already-shipped features: `domain-stats-auto-ratelimit`,

Full detail: CHANGELOG.md (1.9.2).

build/supervisord.conf

@@ -1,4 +1,4 @@
-; SelfPost process supervision (spec 4).
+; SelfPost process supervision.
 ;
 ; Start ORDER is enforced by priority=: OpenDKIM, then the panel (which opens
 ; the journal-milter socket), then the Postfix wrapper — which additionally
@@ -18,8 +18,8 @@ loglevel=info
 
 ; The control socket is reachable by the shared `selfpost` group so the panel
 ; (running as the unprivileged `panel` user) can ask supervisord to send
-; OpenDKIM a reload signal after it rewrites the DKIM tables (spec 6.2). It is
-; still unreachable by world; only root and the two SelfPost services are in the
+; OpenDKIM a reload signal after it rewrites the DKIM tables. It is still
+; unreachable by world; only root and the two SelfPost services are in the
 ; group. No HTTP auth is configured because access is gated by socket
 ; permissions, not the network.
 [unix_http_server]
@@ -67,15 +67,15 @@ stdout_logfile_maxbytes=0
 stderr_logfile=/dev/stderr
 stderr_logfile_maxbytes=0
 
-; One-shot reload helper (spec 5.2, 7.2.12). The panel runs unprivileged and
-; cannot run `postfix reload` itself, and it cannot signal the Postfix master
-; directly: `postfix start-fg` forks a separate master process, so a signal to
-; the supervised foreground process never reaches it (unlike OpenDKIM, which
-; runs in the foreground as the supervised process itself). Instead the panel
-; asks supervisord — over the group-accessible control socket — to run this
-; program, which executes the canonical `postfix reload` as root. autostart is
-; off (it only runs on demand) and a fast, clean exit is expected, so it never
-; trips the crashexit listener.
+; One-shot reload helper. The panel runs unprivileged and cannot run `postfix
+; reload` itself, and it cannot signal the Postfix master directly: `postfix
+; start-fg` forks a separate master process, so a signal to the supervised
+; foreground process never reaches it (unlike OpenDKIM, which runs in the
+; foreground as the supervised process itself). Instead the panel asks
+; supervisord — over the group-accessible control socket — to run this program,
+; which executes the canonical `postfix reload` as root. autostart is off (it
+; only runs on demand) and a fast, clean exit is expected, so it never trips the
+; crashexit listener.
 [program:postfix-reload]
 command=/usr/sbin/postfix reload
 autostart=false
@@ -88,7 +88,7 @@ stdout_logfile_maxbytes=0
 stderr_logfile=/dev/stderr
 stderr_logfile_maxbytes=0
 
-; Periodic TLS-certificate refresh (spec 5.2 p.4). Runs a daily `postfix reload`
+; Periodic TLS-certificate refresh. Runs a daily `postfix reload`
 ; so certificates the reverse-proxy renews in the read-only mount are picked up.
 ; Long-running (it loops), runs as root so it can reload Postfix, and never exits
 ; non-zero, so it neither trips the crashexit listener nor needs restarting.
@@ -103,10 +103,10 @@ stdout_logfile_maxbytes=0
 stderr_logfile=/dev/stderr
 stderr_logfile_maxbytes=0
 
-; Periodic logrotate for /data/log/mail.log (spec 9, 10: daily, 7-14 files kept
-; in the image). Runs as root so logrotate can read/rotate the log. Exits
-; non-zero when the config is group/other-writable (logrotate would ignore it
-; silently); autorestart surfaces BACKOFF on the Status page.
+; Periodic logrotate for /data/log/mail.log (daily, 7-14 files kept in the
+; image). Runs as root so logrotate can read/rotate the log. Exits non-zero when
+; the config is group/other-writable (logrotate would ignore it silently);
+; autorestart surfaces BACKOFF on the Status page.
 [program:logrotate]
 command=/usr/local/bin/logrotate-loop.sh
 priority=400