Add current.json for patch system

- Lists available patches v2.7.3 and v2.7.5
- Configures update server URL correctly
- Marks critical updates

Co-Authored-By: Claude <noreply@anthropic.com>

current.json

@@ -1,8 +1,21 @@
 {
-  "latest": "2.7.4",
-  "stable": "2.7.4",
-  "minimum_supported": "2.7.0",
+  "latest": "2.7.3",
+  "stable": "2.7.3",
+  "minimum_supported": "2.0.0",
   "update_channel": "stable",
-  "last_updated": "2025-01-21T22:00:00Z",
-  "update_server": "http://git.powerdata.dk:3000/masterdraco/IPTV-Updates.git"
+  "last_updated": "2025-09-22T05:50:00Z",
+  "update_server": "http://git.powerdata.dk:3000/masterdraco/IPTV-Updates",
+  "critical_updates": ["2.7.3", "2.7.5"],
+  "available_patches": {
+    "2.7.3": {
+      "name": "Fix duplicate Hardware IDs on cloned VMs",
+      "critical": true,
+      "file": "v2.7.3.patch"
+    },
+    "2.7.5": {
+      "name": "Fix VOD import error",
+      "critical": true,
+      "file": "v2.7.5.patch"
+    }
+  }
 }