chore: publish SS USAGE 1.2.16

1. Publish the Windows stable installer package.
2. Add SHA-256 checksum and release manifest for update discovery.

SS-USAGE/1.2.16/checksums.sha256

@@ -0,0 +1 @@
+b3699377d33086c74146a9bde09eb84f84bcda603bd2770b7c356b38c026eb52  SS-USAGE-1.2.16-win-x64.zip

SS-USAGE/1.2.16/release.json

@@ -0,0 +1,18 @@
+{
+  "product": "SS-USAGE",
+  "displayName": "SS USAGE",
+  "version": "1.2.16",
+  "channel": "stable",
+  "releasedAt": "2026-10-19T12:08:25Z",
+  "notes": "업데이트 안내 화면에서 진행 상태 문구가 게이지와 겹치지 않도록 위치를 바로잡았습니다.",
+  "assets": [
+    {
+      "platform": "win-x64",
+      "file": "SS-USAGE-1.2.16-win-x64.zip",
+      "size": 1879828,
+      "sha256": "b3699377d33086c74146a9bde09eb84f84bcda603bd2770b7c356b38c026eb52",
+      "installer": "UsageMonitor-Setup-1.2.16.exe",
+      "silentArgs": "/VERYSILENT /SUPPRESSMSGBOXES /NORESTART /CLOSEAPPLICATIONS"
+    }
+  ]
+}