Add LTX AV Comfy workflow catalog entry signature

models.json.sig

@@ -4,6 +4,6 @@
   "signed_path": "catalog/models.json",
   "key_id": "mayhem-catalog-tracnetwork-v1",
   "public_key": "aa0a2667d74e31c984a5e4ba34c4bd334f001a640b4ecf807d6812e14e817f24",
-  "blake3": "f225027ea6c28a33db6f6ee20429cfe2f398065467266f1b7e6715e2b79fc71a",
-  "sig": "e6177f7c867670ab13807c5f3cbed1fd60ad5c028cd05d1ec3aebabf21146014d2b3d1962bbb35f828d877270cac2bcd07dec945d06b4ea4f2e519bc6352fb07"
+  "blake3": "2bc81910fbb0dd2374dd907c05d8d5848d6ba58ad0b9f5dff9c8277e91256be9",
+  "sig": "7b01fb0aec5044ca3b60403aad518c199e27e3f68d4fa8c838084e12becbb66c86f4a11ecda01f1a4058b01c5d0c08ce8ef86d7ce5f859e47ea07a875d797703"
 }