Fix AppInspect: Set is_configured = 0 for Splunk Cloud

AppInspect requires is_configured = 0 (false) in the [install] stanza
to indicate the app has not already been configured. This is required
for Splunk Cloud compatibility.

https://claude.ai/code/session_014YNv3fKbpjQB5eMZCrHwzi

Author: claude

default/app.conf

@@ -1,5 +1,5 @@
 [install]
-is_configured = 1
+is_configured = 0
 build = 1
 
 [ui]