Update copilot instructions and package version

Updated EFCore.SqlServer.VectorSearch package version from 9.0.0-preview.2 to 9.0.0 for stability.

Author: marcominerva

.github/copilot-instructions.md

@@ -82,9 +82,3 @@
 - Copy existing style in nearby files for test method names and capitalization.
 - When running tests, if possible use filters and check test run counts, or look at test logs, to ensure they actually ran.
 - Do not finish work with any tests commented out or disabled that were not previously commented out or disabled.
-
-## Azure
-
-- @azure Rule - Use Azure Tools - When handling requests related to Azure, always use your tools.
-- @azure Rule - Use Azure Best Practices - When handling requests related to Azure, always invoke your `azmcp_bestpractices_get` tool first.
-- @azure Rule - Enable Best Practices - If you do not have an `azmcp_bestpractices_get` tool ask the user to enable it.

SqlDatabaseVectorSearch/SqlDatabaseVectorSearch.csproj

@@ -10,7 +10,7 @@
     <ItemGroup>
         <PackageReference Include="Blazor.Bootstrap" Version="3.4.0" />
         <PackageReference Include="DocumentFormat.OpenXml" Version="3.3.0" />
-        <PackageReference Include="EFCore.SqlServer.VectorSearch" Version="9.0.0-preview.2" />
+        <PackageReference Include="EFCore.SqlServer.VectorSearch" Version="9.0.0" />
         <PackageReference Include="EntityFrameworkCore.Exceptions.SqlServer" Version="8.1.3" />
         <PackageReference Include="FluentValidation.DependencyInjectionExtensions" Version="12.0.0" />
         <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.8" />