Update Microsoft.Extensions.AI* to 10.4.0 and System10Version to 10.0.4

Co-authored-by: stephentoub <2642209+stephentoub@users.noreply.github.com>

Author: Copilot

Directory.Packages.props

@@ -3,8 +3,8 @@
     <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
     <System8Version>8.0.22</System8Version>
     <System9Version>9.0.11</System9Version>
-    <System10Version>10.0.3</System10Version>
-    <MicrosoftExtensionsVersion>10.3.0</MicrosoftExtensionsVersion>
+    <System10Version>10.0.4</System10Version>
+    <MicrosoftExtensionsVersion>10.4.0</MicrosoftExtensionsVersion>
   </PropertyGroup>
 
   <!-- Product dependencies shared -->
@@ -67,7 +67,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageVersion>
-    <PackageVersion Include="Microsoft.Extensions.AI.OpenAI" Version="10.2.0-preview.1.26063.2" />
+    <PackageVersion Include="Microsoft.Extensions.AI.OpenAI" Version="10.4.0" />
     <PackageVersion Include="Microsoft.Extensions.DependencyInjection" Version="$(System10Version)" />
     <PackageVersion Include="Microsoft.Extensions.Hosting" Version="$(System10Version)" />
     <PackageVersion Include="Microsoft.Extensions.Logging" Version="$(System10Version)" />