Refactor: standardize namespace and using directive style

Refactored all C# test files to use explicit namespace declarations and moved all using directives inside the namespace block for consistency. Updated assembly info and cache files to reflect the new build. Adjusted MvcTestingAppManifest.json to use fully qualified assembly names. No functional changes; all updates are related to code style, organization, and project metadata.

MediaBrowser.Model/Cryptography/ICryptoProvider.cs

@@ -4,25 +4,23 @@
 
 #pragma warning disable CS1591
 
-using System;
+using global::System;
 
-namespace MediaBrowser.Model.Cryptography
-{
-    public interface ICryptoProvider
-    {
-        string DefaultHashMethod { get; }
+namespace MediaBrowser.Model.Cryptography;
+   public interface ICryptoProvider
+   {
+       string DefaultHashMethod { get; }
 
-        /// <summary>
-        /// Creates a new <see cref="PasswordHash" /> instance.
-        /// </summary>
-        /// <param name="password">The password that will be hashed.</param>
-        /// <returns>A <see cref="PasswordHash" /> instance with the hash method, hash, salt and number of iterations.</returns>
-        PasswordHash CreatePasswordHash(ReadOnlySpan<char> password);
+       /// <summary>
+       /// Creates a new <see cref="PasswordHash" /> instance.
+       /// </summary>
+       /// <param name="password">The password that will be hashed.</param>
+       /// <returns>A <see cref="PasswordHash" /> instance with the hash method, hash, salt and number of iterations.</returns>
+       PasswordHash CreatePasswordHash(ReadOnlySpan<char> password);
 
-        bool Verify(PasswordHash hash, ReadOnlySpan<char> password);
+       bool Verify(PasswordHash hash, ReadOnlySpan<char> password);
 
-        byte[] GenerateSalt();
+       byte[] GenerateSalt();
 
-        byte[] GenerateSalt(int length);
-    }
-}
+       byte[] GenerateSalt(int length);
+   }