chore(ci): disable Azure Pipeline in favour of GitHub Actions

CI is fully covered by dotnet-ci.yml (build, test, coverage,
commitlint) and dotnet-cd.yml (release). The Azure Pipeline added
queue latency with no unique value. Kept azure-pipelines.yml for
educational reference with triggers set to none.

Removes the Azure DevOps build badge from README.md.

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: nanotaboada

README.md

@@ -3,7 +3,6 @@
 [![.NET CI](https://github.com/nanotaboada/Dotnet.Samples.AspNetCore.WebApi/actions/workflows/dotnet-ci.yml/badge.svg)](https://github.com/nanotaboada/Dotnet.Samples.AspNetCore.WebApi/actions/workflows/dotnet-ci.yml)
 [![.NET CD](https://github.com/nanotaboada/Dotnet.Samples.AspNetCore.WebApi/actions/workflows/dotnet-cd.yml/badge.svg)](https://github.com/nanotaboada/Dotnet.Samples.AspNetCore.WebApi/actions/workflows/dotnet-cd.yml)
 [![CodeQL](https://github.com/nanotaboada/Dotnet.Samples.AspNetCore.WebApi/actions/workflows/github-code-scanning/codeql/badge.svg)](https://github.com/nanotaboada/Dotnet.Samples.AspNetCore.WebApi/actions/workflows/github-code-scanning/codeql)
-[![Build Status](https://dev.azure.com/nanotaboada/Dotnet.Samples.AspNetCore.WebApi/_apis/build/status%2FDotnet.Samples.AspNetCore.WebApi?branchName=master)](https://dev.azure.com/nanotaboada/Dotnet.Samples.AspNetCore.WebApi/_build/latest?definitionId=14&branchName=master)
 [![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=nanotaboada_Dotnet.Samples.AspNetCore.WebApi&metric=alert_status)](https://sonarcloud.io/summary/new_code?id=nanotaboada_Dotnet.Samples.AspNetCore.WebApi)
 [![codecov](https://codecov.io/gh/nanotaboada/Dotnet.Samples.AspNetCore.WebApi/graph/badge.svg?token=hgJc1rStJ9)](https://codecov.io/gh/nanotaboada/Dotnet.Samples.AspNetCore.WebApi)
 [![CodeFactor](https://www.codefactor.io/repository/github/nanotaboada/Dotnet.Samples.AspNetCore.WebApi/badge)](https://www.codefactor.io/repository/github/nanotaboada/Dotnet.Samples.AspNetCore.WebApi)

azure-pipelines.yml

@@ -3,15 +3,11 @@
 # https://learn.microsoft.com/en-us/azure/devops/pipelines/ecosystems/dotnet-core
 
 # Pipeline triggers:
-# - Runs on pushes to master (production deployments)
-# - Runs on all pull requests to master (validation before merge)
-# - Does NOT run on pushes to development branches (cost optimization)
-# Development branches (refactor/*, fix/*, feat/*, etc.) are validated only when a PR is opened
-trigger:
-  - master
+# - Disabled: CI is fully covered by GitHub Actions (.github/workflows/dotnet-ci.yml)
+# - Kept for educational/reference purposes only
+trigger: none
 
-pr:
-  - master
+pr: none
 
 # Agent pool configuration (equivalent to GitHub Actions 'runs-on: ubuntu-latest')
 pool: