Update schemas/dab.draft.schema.json

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: aaronburtle

schemas/dab.draft.schema.json

@@ -486,7 +486,8 @@
             "ttl-seconds": {
               "type": "integer",
               "description": "Time to live in seconds",
-              "default": 5
+              "default": 5,
+              "minimum": 1
             },
             "level-2": {
               "type": "object",