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  - Unused legacy asset `docs/assets/icon.png` (superseded by the four brand SVGs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

@@ -0,0 +1,27 @@
+<!-- title: Quarantine | section: inbound | page: quarantine -->
+    <div class="sp-head">
+      <div class="sp-grow">
+        <p class="sp-kicker">Inbound</p>
+        <h1 class="title is-3">Quarantine</h1>
+        <p class="sp-lead">Mail the filter found suspicious enough to hold, but not to refuse. Release hands a message to its upstream as if it had just arrived; Discard deletes it. Anything left is deleted after 14 days.</p>
+      </div>
+    </div>
+
+    <div class="box">
+      <div class="sp-box-head">
+        <span class="sp-no">01</span><h2>Held messages</h2>
+        <form class="sp-end" method="get" action="#">
+          <div class="select"><select name="domain"><option>All domains</option><option>lists.example.org</option><option>acme.io</option></select></div>
+          <button type="submit" class="button"><i class="ti ti-filter"></i>Filter</button>
+        </form>
+      </div>
+      <div class="table-container"><table class="table is-fullwidth is-hoverable">
+        <thead><tr><th>Held, UTC</th><th>From</th><th>To</th><th>Subject</th><th>Why</th><th>Size</th><th>Deleted in</th><th></th></tr></thead>
+        <tbody>
+          <tr><td class="sp-mono sp-muted sp-nowrap sp-small">09-21 13:59:02</td><td>invoice@<wbr>partner-billing.example</td><td>owner@<wbr>lists.example.org</td><td class="sp-clip"><a href="in-quarantine-message.html"><strong>Outstanding invoice — action required</strong></a></td><td class="sp-muted sp-small">score 9.8 · PHISHING</td><td class="sp-muted sp-nowrap">48 kB</td><td class="sp-nowrap">14 days</td><td class="sp-actions"><a href="in-quarantine-message.html">Review</a></td></tr>
+          <tr><td class="sp-mono sp-muted sp-nowrap sp-small">09-20 22:14:40</td><td>no-reply@<wbr>shipping-update.example</td><td>jobs@<wbr>acme.io</td><td class="sp-clip"><a href="in-quarantine-message.html"><strong>Your parcel could not be delivered</strong></a></td><td class="sp-muted sp-small">score 8.1 · URL_SHORTENER</td><td class="sp-muted sp-nowrap">12 kB</td><td class="sp-nowrap">13 days</td><td class="sp-actions"><a href="in-quarantine-message.html">Review</a></td></tr>
+          <tr><td class="sp-mono sp-muted sp-nowrap sp-small">09-09 07:02:11</td><td>m.ortega@<wbr>supplier.example</td><td>owner@<wbr>lists.example.org</td><td class="sp-clip"><a href="in-quarantine-message.html"><strong>Fwd: scanned contract (3 attachments)</strong></a></td><td class="sp-muted sp-small">score 7.4 · MIME_ARCHIVE</td><td class="sp-muted sp-nowrap">2.9 MB</td><td class="sp-nowrap"><span class="tag is-warning is-light">2 days</span></td><td class="sp-actions"><a href="in-quarantine-message.html">Review</a></td></tr>
+        </tbody>
+      </table></div>
+      <div class="sp-box-foot"><span>3 messages · 3.0 MB of 500 MB</span><span class="sp-end">A domain administrator sees only their assigned inbound domains</span></div>
+    </div>