Upgrade Aspire and markdown package versions

[mpaulosky]

Refs #335

Summary

Upgrade Aspire hosting/testing/driver/cache packages to 13.3.2, align Aspire.AppHost.Sdk to 13.3.2, and bump markdown editor stack package versions.

Closes #335

Type of Change

• ⚙️ Infra/CI (GitHub Actions, Aspire, NuGet, deployment)
• ♻️ Refactor (no behavior change, code cleanup/restructure)

Domain Affected

• 🏗️ Architecture / domain logic / CQRS → Aragorn required
• ⚙️ CI/CD / GitHub Actions / NuGet / Aspire AppHost → Boromir required

Self-Review Checklist

Code Quality

• I ran dotnet build MyBlog.slnx --configuration Release — 0 errors, 0 warnings
• I ran dotnet test MyBlog.slnx --configuration Release --no-build — all pass
• No TODO/FIXME left unless tracked in a follow-up issue (link it)
• No secrets, API keys, or credentials committed

Merge Readiness

• Branch is up to date with main (no merge conflicts)
• CI checks are green (do not request review while checks are pending/failing)
• PR description is complete — reviewers should not have to ask what this does

[github-actions]

🏗️ PR Added to Squad Triage Queue

This PR has been labeled with squad and added to the triage queue.

Next steps:

• The squad Lead will review and assign to an appropriate team member
• A squad:member label will be added after triage

If you know which squad member should handle this, you can add the appropriate squad:member label yourself.

[Copilot]

Pull request overview

Routine dependency bump aligning Aspire hosting/testing/integration packages from 13.3.1 → 13.3.2 (with a matching Aspire.AppHost.Sdk bump to 13.3.2), and bumping the markdown editor stack (Markdig and PSC.Blazor.Components.MarkdownEditor). Also adds two blank lines in AppHost.cs for readability.

Changes:

• Bump Aspire.* packages and Aspire.AppHost.Sdk to 13.3.2
• Bump Markdig to 1.2.0 and PSC.Blazor.Components.MarkdownEditor to 10.0.8
• Minor whitespace formatting in src/AppHost/AppHost.cs

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
Directory.Packages.props	Updates Aspire package versions to 13.3.2 and bumps markdown package versions
src/AppHost/AppHost.csproj	Bumps Aspire.AppHost.Sdk from 13.3.0 → 13.3.2
src/AppHost/AppHost.cs	Adds two blank lines for readability around mongo/redis setup

[github-actions]

Test Results Summary

385 tests  ±0   384 ✅ ±0   23s ⏱️ +2s
  6 suites ±0     1 💤 ±0 
  6 files   ±0     0 ❌ ±0 

Results for commit 8395d63. ± Comparison against base commit abd7e4b.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.66%. Comparing base (abd7e4b) to head (8395d63).

Additional details and impacted files

@@           Coverage Diff           @@
##              dev     #336   +/-   ##
=======================================
  Coverage   81.66%   81.66%           
=======================================
  Files          51       51           
  Lines        1369     1369           
  Branches      166      166           
=======================================
  Hits         1118     1118           
  Misses        184      184           
  Partials       67       67           

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