Update signed manifest to 7.28.3

manifest.json

@@ -1,11 +1,11 @@
 {
-    "version": "7.23.32",
-    "released_at": "2026-08-12T15:26:37+00:00",
-    "package_url": "https://git-cloud.weboria.eu/Weboria/argus-wp-defence/releases/download/v7.23.32/argus-wordpress-defence-7.23.32.zip",
-    "sha256": "6439eb8b52c3ffec514d73705ea57aa461fcfe2e781bd0c298688697ed0ee2ea",
+    "version": "7.28.3",
+    "released_at": "2026-08-26T09:17:12+00:00",
+    "package_url": "https://git-cloud.weboria.eu/Weboria/argus-wp-defence/releases/download/v7.28.3/argus-wordpress-defence-7.28.3.zip",
+    "sha256": "31aadccb8d21e69de528dd613e350ec749352edcf7bd4ebbf8e3d7bd2a8c9ee5",
     "min_php": "7.4",
     "min_wp": "6.0",
     "critical": false,
-    "summary": "* Fixed a real bug found on a live production site right after 7.23.31 shipped: the new\n  self-health-check for the scanner and the update mechanism compared timestamps in the wrong\n  format, so it could report \"hasn't run in hours\" / \"hasn't checked in 2 days\" even seconds after\n  they genuinely had. Both are now correctly recognized as healthy when they actually are.",
-    "signature": "XnGoKDoybXWln+XMgRVSYJM+0VMsvXRvJfnoDTf0bCvkLdX5a+Enq2jIMrMouDCrHmp7qp76/0P2tRmA0PidDA=="
+    "summary": "* Fixed \"Run a scan now\" occasionally not returning to the Scanner page after starting a scan.\n* Scan errors (for example, a scan already in progress) are now shown clearly instead of the\n  button silently doing nothing.\n* Improved the reliability of scheduled protection tasks (scans, threat intelligence updates,\n  and firewall enforcement) so they keep running even in unusual hosting situations.",
+    "signature": "7QJWy1HleCIno5q5rG3WtkLfJqxmMdZfwJR9l326emfNAmbpOcaB2WJk9+o/OWuNXEcuHNOHkIFNaCwo9K1YCQ=="
 }