chore(deps): bump packages flagged by NU190x advisories

Restore inside the docker build was failing because TreatWarningsAsErrors
promotes NU1902/NU1903/NU1904 (vulnerable package warnings) to errors.
Bump the flagged packages to advisory-free versions:

- MailKit                                          4.15.1 -> 4.16.0    (GHSA-9j88-vvj5-vhgr)
- Microsoft.AspNetCore.DataProtection.EFCore       10.0.5 -> 10.0.7    (GHSA-9mv3-2cwr-p262, transitively pulls fixed System.Security.Cryptography.Xml — GHSA-37gx-xxp4-5rgx, GHSA-w3x6-4m5h-cxqf)
- OpenTelemetry.Api  (transitive via Akka.Hosting) 1.9.0  -> 1.15.3    (GHSA-g94r-2vxg-569j, GHSA-8785-wc3w-h8q6) — added as a direct PackageReference in ScadaLink.Host to override the Akka.Hosting pin

To resolve the NU1605 downgrade chain triggered by DataProtection.EFCore
10.0.7 (which transitively requires Microsoft.EntityFrameworkCore >= 10.0.7
and friends), bump every Microsoft.* 10.0.5 reference across src/ and
tests/ to 10.0.7 in lockstep.

tests/ScadaLink.IntegrationTests/ScadaLink.IntegrationTests.csproj

@@ -15,8 +15,8 @@
   <ItemGroup>
     <PackageReference Include="Akka.TestKit.Xunit2" Version="1.5.62" />
     <PackageReference Include="coverlet.collector" Version="6.0.4" />
-    <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="10.0.5" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="10.0.5" />
+    <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="10.0.7" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="10.0.7" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <PackageReference Include="xunit" Version="2.9.3" />
     <PackageReference Include="NSubstitute" Version="5.3.0" />