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  - Unused legacy asset `docs/assets/icon.png` (superseded by the four brand SVGs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).

docs/assets/panel-redesign/panel/src/out-queue.html

@@ -0,0 +1,30 @@
+<!-- title: Outbound queue | section: outbound | page: queue -->
+    <div class="sp-head">
+      <div class="sp-grow">
+        <p class="sp-kicker">Outbound</p>
+        <h1 class="title is-3">Outbound queue</h1>
+        <p class="sp-lead">Messages accepted from applications and still waiting for the receiving server. Refreshes every 10 s.</p>
+      </div>
+    </div>
+
+    <div class="box">
+      <div class="sp-box-head"><span class="sp-no">01</span><h2>Waiting</h2><div class="sp-end">1 message · 3.1 kB</div></div>
+      <div class="table-container"><table class="table is-fullwidth is-hoverable">
+        <thead><tr><th>Queue id</th><th>Arrived, UTC</th><th>From</th><th>To</th><th>Last reply</th><th></th></tr></thead>
+        <tbody>
+          <tr><td class="sp-mono">4XcB7k2Jm9z1</td><td class="sp-mono sp-muted sp-nowrap sp-small">09-21 13:58:07</td><td>alerts@<wbr>example.org</td><td>noc@<wbr>example.org</td><td class="sp-muted">451 4.7.1 Greylisted, try again in 5 minutes</td><td class="sp-actions"><a href="out-message.html">Details</a></td></tr>
+        </tbody>
+      </table></div>
+    </div>
+
+    <div class="box">
+      <div class="sp-box-head"><span class="sp-no">02</span><h2>How retries work</h2><div class="sp-end">This Postfix's policy, read at panel start</div></div>
+      <div class="sp-box-body">
+        <dl class="sp-facts">
+          <div><dt>First retry</dt><dd class="sp-big">5 min</dd></div>
+          <div><dt>Later retries</dt><dd class="sp-big">doubling</dd><dd class="sp-muted">capped at 66 min</dd></div>
+          <div><dt>Kept in queue</dt><dd class="sp-big">5 days</dd></div>
+          <div><dt>Then</dt><dd class="sp-big">bounced</dd><dd class="sp-muted">no attempt counter, only time</dd></div>
+        </dl>
+      </div>
+    </div>