internal/api_common.go
func FullyQualifiedAppID(ctx netcontext.Context) string {
	if id, ok := ctx.Value(&appIDOverrideKey).(string); ok {
		return id
	}
	return fullyQualifiedAppID(ctx)
}
func FullyQualifiedAppID(ctx netcontext.Context) string {
	if id, ok := ctx.Value(&appIDOverrideKey).(string); ok {
		return id
	}
	return fullyQualifiedAppID(ctx)
}
// FullyQualifiedAppID returns the fully-qualified application ID.
// This may contain a partition prefix (e.g. "s~" for High Replication apps),
// or a domain prefix (e.g. "example.com:").