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  - Unused legacy asset `docs/assets/icon.png` (superseded by the four brand SVGs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

test/e2e/port25_config_check_test.go

@@ -0,0 +1,62 @@
+package e2e
+
+import "testing"
+
+// realMasterCfSample is captured verbatim (via `cat -A`) from a container
+// generated with INBOUND_RELAY_ENABLE=false DMARC_REPORTS_ENABLE=true: after
+// the unconditional `postconf -F "*/*/chroot=n"` rewraps the file, the
+// smtp/inet stanza's options are spread across several continuation lines
+// that split values mid-token and re-flow what were originally separate
+// "-o " lines into one paragraph. Confirms parseSMTPInetOptions reconstructs
+// the logical options from that rather than a plain single-option-per-line
+// master.cf.
+const realMasterCfSample = `smtp       inet  n       -       n       -       -       smtpd
+    -o smtpd_milters=
+    -o smtpd_recipient_restrictions=check_recipient_access
+    texthash:/data/postfix/dmarc_recipients,reject -o smtpd_sasl_auth_enable=no
+    -o smtpd_tls_auth_only=no -o smtpd_sender_login_maps= -o
+    smtpd_sender_restrictions= -o smtpd_client_restrictions= -o
+    smtpd_relay_restrictions=reject_unauth_destination -o
+    smtpd_client_message_rate_limit=20 -o message_size_limit=5242880
+pickup     unix  n       -       n       60      1       pickup
+`
+
+func TestParseSMTPInetOptionsAcrossContinuationLines(t *testing.T) {
+	stanza := smtpInetStanza(realMasterCfSample)
+	opts := parseSMTPInetOptions(stanza)
+
+	want := map[string]string{
+		"smtpd_milters":                   "",
+		"smtpd_recipient_restrictions":    "check_recipient_access texthash:/data/postfix/dmarc_recipients,reject",
+		"smtpd_sasl_auth_enable":          "no",
+		"smtpd_tls_auth_only":             "no",
+		"smtpd_sender_login_maps":         "",
+		"smtpd_sender_restrictions":       "",
+		"smtpd_client_restrictions":       "",
+		"smtpd_relay_restrictions":        "reject_unauth_destination",
+		"smtpd_client_message_rate_limit": "20",
+		"message_size_limit":              "5242880",
+	}
+	for param, wantVal := range want {
+		if got, ok := opts[param]; !ok || got != wantVal {
+			t.Errorf("opts[%q] = %q (present=%v), want %q", param, got, ok, wantVal)
+		}
+	}
+	if len(opts) != len(want) {
+		t.Errorf("parsed %d options, want %d: %+v", len(opts), len(want), opts)
+	}
+}
+
+func TestSMTPInetStanzaSkipsDeliveryAgent(t *testing.T) {
+	master := "smtp       unix  -       -       n       -       -       smtp\n" +
+		"#       -o smtp_helo_timeout=5\n" +
+		realMasterCfSample
+	stanza := smtpInetStanza(master)
+	if stanza == "" {
+		t.Fatal("no smtp/inet stanza found")
+	}
+	opts := parseSMTPInetOptions(stanza)
+	if v, ok := opts["smtpd_milters"]; !ok || v != "" {
+		t.Fatalf("picked up the wrong \"smtp\" service: opts = %+v", opts)
+	}
+}