release: 1.9.0 — rolls up the 1.8.1 patch series

Bundled stable cut for prod. Contents since 1.8.0:

* fix(rotate): unifi.password_rotation.last_password is now saved on
  successful PPSK rotation as well as whole-SSID rotation. PPSK-only
  setups (typical guest-WiFi configurations) will populate the
  Settings → Tasks "current password" display and the
  /api/unifi/wifi/current-password endpoint after the next rotation.

* fix(banded-ssid): when an SSID is split across 2.4 and 5GHz bands
  (band-steering disabled — two wlanconf rows with the same name),
  rotating or manually editing a PPSK on one band now also updates
  the same-name PPSK on every sibling band. Previously the two halves
  drifted out of sync. Both the rotation scheduler and the WiFi modal
  use the new UnifiApiClient::getWlanSiblings helper.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

composer.json

@@ -1,7 +1,7 @@
 {
     "name": "dashboard/unifi",
     "description": "UniFi network management, WiFi stats, and captive portal authentication for the Dashboard platform",
-    "version": "1.8.1",
+    "version": "1.9.0",
     "type": "library",
     "license": "MIT",
     "autoload": {