Add CI build pipeline with GitHub Actions

[Copilot]

Adds automated build and test pipeline using GitHub Actions.

Changes

• CI Workflow (.github/workflows/ci.yml): Builds .NET 10.0 solution and runs MSTest suite on push/PR to main
• Security: Explicit contents: read permissions to follow principle of least privilege
• Housekeeping: Updated .gitignore to exclude *.log files

The workflow executes dotnet restore, dotnet build, and dotnet test in sequence with dependency caching between steps.

Original prompt

Add CI Build Pipeline

Work Item Details

Note: Please focus on the descriptions and information that provide context about the task requirements, functionality, and implementation details. Dates, priorities, and administrative metadata are less relevant for coding tasks.

Description

Add a CI build pipeline that builds the project and runs tests.

Acceptance Criteria

Tests are executed and pass.

Work item: AB#11
Created via Azure DevOps

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