chore(deps): rely on central Pkcs pin, drop redundant VersionOverride (#1328) (#1334)

Remove VersionOverride attributes that duplicate the exact central pin in
Directory.Packages.props (dependabot mechanical edits from #1288 and
c638e16). Resolved versions are unchanged; the references now follow
the central pin so future security bumps to Directory.Packages.props
cannot silently strand these projects on old versions.

- PPDS.Auth: System.Security.Cryptography.Pkcs (central 10.0.9)
- PPDS.Migration: Microsoft.Data.SqlClient (central 6.1.4)

The differing Microsoft.Extensions.Logging VersionOverride=10.0.5 in
PPDS.Auth is left in place; tracked separately in #1330.

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

Author: joshsmithxrm

src/PPDS.Auth/PPDS.Auth.csproj

@@ -84,7 +84,7 @@
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" />
 
     <!-- JSON serialization -->
-    <PackageReference Include="System.Security.Cryptography.Pkcs" VersionOverride="10.0.9" />
+    <PackageReference Include="System.Security.Cryptography.Pkcs" />
     <PackageReference Include="System.Text.Json" />
 
     <!-- JWT token parsing for extracting claims -->

src/PPDS.Migration/PPDS.Migration.csproj

@@ -45,7 +45,7 @@ dependency-aware tiered import, and CMT format compatibility for automated pipel
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Data.SqlClient" VersionOverride="6.1.4" />
+    <PackageReference Include="Microsoft.Data.SqlClient" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection.Abstractions" />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" />