Update and align NuGet dependencies; drop net7.0 from Web

- Downgrade Microsoft.Data.SqlClient to 5.2.2 in Application and Infrastructure projects
- Downgrade Microsoft.Extensions.DependencyInjection to 8.0.1 for net8.0 in Application
- Remove net7.0 target and related packages from Web project
- Upgrade OpenApi and Caching.SqlServer to 8.0.17 (net8.0) and 9.0.6 (net9.0) in Web
- Ensures consistent, compatible package versions across solution

EnvelopeGenerator.Application/EnvelopeGenerator.Application.csproj

@@ -37,7 +37,7 @@
 	</ItemGroup>
 
 	<ItemGroup Condition="'$(TargetFramework)' == 'net8.0'">
-		<PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="9.0.5" />
+		<PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="8.0.1" />
 	</ItemGroup>
 
 	<ItemGroup Condition="'$(TargetFramework)' == 'net9.0'">
@@ -80,7 +80,7 @@
 
 	<ItemGroup Condition="'$(TargetFramework)' == 'net7.0'">
 	  <PackageReference Include="AutoMapper" Version="13.0.1" />
-	  <PackageReference Include="Microsoft.Data.SqlClient" Version="6.1.4" />
+	  <PackageReference Include="Microsoft.Data.SqlClient" Version="5.2.2" />
 	  <PackageReference Include="CommandDotNet">
 		<Version>7.0.5</Version>
 	  </PackageReference>
@@ -88,7 +88,6 @@
 
 	<ItemGroup Condition="'$(TargetFramework)' == 'net8.0'">
 	  <PackageReference Include="AutoMapper" Version="14.0.0" />
-	  <PackageReference Include="Microsoft.Data.SqlClient" Version="6.0.2" />
 	  <PackageReference Include="CommandDotNet">
 	    <Version>8.1.1</Version>
 	  </PackageReference>
@@ -96,7 +95,6 @@
 
 	<ItemGroup Condition="'$(TargetFramework)' == 'net9.0'">
 	  <PackageReference Include="AutoMapper" Version="14.0.0" />
-	  <PackageReference Include="Microsoft.Data.SqlClient" Version="6.0.2" />
 	  <PackageReference Include="CommandDotNet">
 	    <Version>8.1.1</Version>
 	  </PackageReference>