docs re-org, audit fixes, build fixes

src/AirGap/StellaOps.AirGap.Controller/Auth/HeaderScopeAuthenticationHandler.cs

@@ -72,6 +72,11 @@ public sealed class HeaderScopeAuthenticationHandler : AuthenticationHandler<Aut
 
         foreach (var value in values)
         {
+            if (string.IsNullOrEmpty(value))
+            {
+                continue;
+            }
+
             foreach (var scope in value.Split(' ', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries))
             {
                 scopes.Add(scope);