Refactor for .NET 10 CI/CD and pinned Bootstrap CDN assets

[Copilot]

The app was still targeting .NET 6 and using local Bootstrap assets. This update moves the project to .NET 10 and adds a GitHub Actions path that builds/tests on .NET 10, deploys to UAT, then promotes to production via slot swap.

• .NET 10 upgrade

  • Bumped the app target framework to net10.0.
  • Kept the project aligned with the SDK/CLI flow so framework updates stay explicit.

• Bootstrap references

  • Replaced local Bootstrap files with pinned CDN assets.
  • Added SRI attributes so the runtime asset source is deterministic and verifiable.

• GitHub Actions CI/CD

  • Added a new workflow for:
    • restore/build/test/publish on .NET 10
    • UAT deployment using app service name/resource group variables
    • production promotion via slot swap
  • Designed so the app service name can be changed at the top of the workflow.

env:
  DOTNET_VERSION: "10.0.x"
  APP_SERVICE_NAME: ${{ vars.APP_SERVICE_NAME }}
  RESOURCE_GROUP: ${{ vars.RESOURCE_GROUP }}
  UAT_SLOT_NAME: "uat"
  PRODUCTION_SLOT_NAME: "production"

• Fixes Refactor for dotnet add cicd and reference live bootstrap:latest #55

[sonarqubecloud]

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