Update dependencies and improve configuration handling

Updated package references in `EasyVault.SDK.csproj` and
`EasyVault.Server.csproj` to newer versions for improved
compatibility and security. Introduced a `DefaultServerUrlKey`
constant in `ConfigurationExtensions` to reduce hardcoded
strings and enhance maintainability. Updated the `AddSecrets`
method to use the new constant. Removed the unused
`Mattermost.NET` package from `EasyVault.Server.csproj`.

Author: Vadim Belov

Sources/EasyVault.SDK/EasyVault.SDK.csproj

@@ -28,9 +28,9 @@
 	<ItemGroup>
 		<None Include="vault.png" Pack="true" PackagePath="" />
 		<None Include="..\..\README.md" Pack="true" PackagePath="\" />
-		<PackageReference Include="System.Text.Json" Version="9.0.8" />
-		<PackageReference Include="Microsoft.Extensions.Configuration" Version="9.0.8" />
-		<PackageReference Include="System.Configuration.ConfigurationManager" Version="9.0.8" />
+		<PackageReference Include="System.Text.Json" Version="9.0.10" />
+		<PackageReference Include="Microsoft.Extensions.Configuration" Version="9.0.10" />
+		<PackageReference Include="System.Configuration.ConfigurationManager" Version="9.0.10" />
 		<PackageReference Include="Microsoft.SourceLink.GitHub" Version="8.0.0" PrivateAssets="All" />
 	</ItemGroup>
 </Project>

Sources/EasyVault.SDK/Extensions/ConfigurationExtensions.cs

@@ -10,6 +10,11 @@ namespace EasyVault.SDK.Extensions
     /// </summary>
     public static class ConfigurationExtensions
     {
+        /// <summary>
+        /// Represents the configuration key used to specify the default server URL for the Vault API.
+        /// </summary>
+        public const string DefaultServerUrlKey = "VaultApiUrl";
+
         /// <summary>
         /// Adds secrets from the EasyVault API to the configuration through In-Memory collection.
         /// </summary>
@@ -21,7 +26,7 @@ public static class ConfigurationExtensions
         /// <returns>The updated configuration.</returns>
         /// <exception cref="ArgumentException">Thrown when the configuration key is not set or is not a valid GUID.</exception>
         /// <exception cref="InvalidOperationException">Thrown when no secrets are found for the API key.</exception>
-        public static ConfigurationManager AddSecrets(this ConfigurationManager configuration, string serverUrlKey = "VaultApiUrl",
+        public static ConfigurationManager AddSecrets(this ConfigurationManager configuration, string serverUrlKey = DefaultServerUrlKey,
             string configurationKey = "VaultApiKey", bool throwIfError = true, bool ignoreInDevelopment = true)
         {
             // Try flat key first, then nested section key as fallback

Sources/EasyVault.Server/EasyVault.Server.csproj

@@ -9,18 +9,17 @@
 		<SpaProxyServerUrl>https://localhost:51031</SpaProxyServerUrl>
 	</PropertyGroup>
 	<ItemGroup>
-		<PackageReference Include="EasyExtensions.AspNetCore" Version="1.0.34" />
-		<PackageReference Include="EasyExtensions.EntityFrameworkCore" Version="1.0.34" />
-		<PackageReference Include="Mattermost.NET" Version="3.0.3" />
-		<PackageReference Include="Microsoft.AspNetCore.SpaServices.Extensions" Version="9.0.8" />
-		<PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="9.0.8" />
-		<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="9.0.8">
+		<PackageReference Include="EasyExtensions.AspNetCore" Version="2.0.9" />
+		<PackageReference Include="EasyExtensions.EntityFrameworkCore" Version="2.0.9" />
+		<PackageReference Include="Microsoft.AspNetCore.SpaServices.Extensions" Version="9.0.10" />
+		<PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="9.0.10" />
+		<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="9.0.10">
 			<PrivateAssets>all</PrivateAssets>
 			<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
 		</PackageReference>
 		<PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.22.1" />
 		<PackageReference Include="Microsoft.AspNetCore.SpaProxy">
-			<Version>9.0.8</Version>
+			<Version>9.0.10</Version>
 		</PackageReference>
 		<ProjectReference Include="..\easyvault.client\easyvault.client.esproj">
 			<ReferenceOutputAssembly>false</ReferenceOutputAssembly>