Bump MessagePack from 2.5.301 to 3.1.7 (#80)

---
updated-dependencies:
- dependency-name: MessagePack
  dependency-version: 3.1.7
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Directory.Packages.props

@@ -44,7 +44,7 @@
        MessagePack 2.5.192, flagged by NuGetAudit (GHSA-hv8m-jj95-wg3x, LZ4
        decompression DoS). Pin to the patched v2 (2.5.301) to clear the audit. -->
   <ItemGroup>
-    <PackageVersion Include="MessagePack" Version="2.5.301" />
+    <PackageVersion Include="MessagePack" Version="3.1.7" />
   </ItemGroup>
   <!-- Transitive audit suppress: Microsoft.Data.Sqlite → SQLitePCLRaw.lib.e_sqlite3 2.1.11
        is flagged by NuGetAudit (GHSA-2m69-gcr7-jv3q, CVE-2025-6965 — SQLite < 3.50.2