Add built 1-gang OTA image + index entry (multi-gesture build)

Firmware compiled on GitHub Actions from this branch (run 29770877601):
SWITCH_BSEED_TS0726_1GANG, router. Committing artifacts by hand (fork's
Actions token is read-only). src/ unchanged from e7a1ff5, so behaviour
matches the validated 4-gang build.

Version 1.1.2-d9f73f5f (fileVersion 285356048, imageType 45580); index
entry matches _TZ3002_jn2x20tg for the romasku->romasku upgrade path.
sha512 + size verified against the index.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: neneonline

bin/router/SWITCH_BSEED_TS0726_1GANG/tlc_switch-1.1.2-d9f73f5f-forced.zigbee

@@ -26,5 +26,19 @@
       "_TZ3002_pzao9ls1",
       "pzao9ls1"
     ]
+  },
+  {
+    "fileName": "tlc_switch-1.1.2-d9f73f5f.zigbee",
+    "fileVersion": 285356048,
+    "fileSize": 181698,
+    "url": "https://github.com/neneonline/tuya-zigbee-switch/raw/refs/heads/feat/multigesture-fixes/bin/router/SWITCH_BSEED_TS0726_1GANG/tlc_switch-1.1.2-d9f73f5f.zigbee",
+    "imageType": 45580,
+    "manufacturerCode": 4417,
+    "sha512": "13095c072b25ec3f15f7b4b34aafa4d8ea46f8839e0ab8b71534130f8166058fa8e6b1d60e05c2dfcdd8f192654380f33f7d33f50ed59de09de73617a9960a76",
+    "otaHeaderString": "Telink OTA Image\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000\u0000",
+    "manufacturerName": [
+      "_TZ3002_jn2x20tg",
+      "jn2x20tg"
+    ]
   }
 ]