fix: add minimum constraint to waitTimeout schema definition

Author: CheeseTree Developer

docs/public/demo-time.schema.json

@@ -1300,6 +1300,7 @@
     "waitTimeout": {
       "type": "number",
       "default": 5000,
+      "minimum": 1,
       "title": "Maximum time in milliseconds to wait for shell integration to confirm command completion. Overrides the default 5000ms cap. Useful for long-running commands such as builds or test suites."
     },
     "url": {