[Ops] Add Azure Monitor, release verification, and redeploy evidence collection

[Josan88]

Summary

Add operational evidence so the team can prove the Azure deployment remains healthy after release and after source changes.

Tasks

• Connect production Azure Container Apps logs and metrics to Azure Monitor
• Monitor the deployed service and /health endpoint
• Track uptime, response time, request volume, throughput, and backend error rates
• Capture evidence for 99% uptime, average response time of 2 seconds or less, and issue detection/recovery within 10 minutes
• Define a post-deploy verification checklist
• Capture logs, screenshots, dashboards, public URLs, and redeploy proof for the presentation and report
• Demonstrate a source change that triggers redeployment and a visible update

Done criteria

• Azure Monitor evidence exists for production health, logs, metrics, and availability
• Monitoring evidence maps to the brief's uptime, response-time, and recovery metrics
• The team has a reusable release verification checklist
• Redeploy evidence exists for the project demonstration and final report

Reference

• Parent tracker: Implementation Tracker: BookRunner Azure DevOps Migration #1
• Project brief target: Azure Monitor
• Related performance evidence: [Performance] Capture response time, throughput, concurrency, and deployment-time evidence #15