[MCCProgrammer]

What

The README still said "in development" and listed the v1 features as planned. This PR changes it to match the live project:

• Status: links the live site, https://extpulse.mccprogrammer.com.
• Badges: adds the SonarQube Cloud quality gate and coverage badges, next to CI and CodeQL.
• What it does: replaces "Planned (v1)" with a list of what works today.
• Architecture: a Mermaid diagram of the app, the VM, the stores, the monitoring, the backups and CI. I rendered it with mermaid-cli and checked the layout.
• Engineering highlights:
  • tests against recorded store responses, plus a weekly run against the live stores;
  • window functions in the stats SQL;
  • the two security chains;
  • Terraform at 0 € with quotas;
  • CI/CD with rollback;
  • observability with unit-tested alert rules;
  • the 19 ADRs.
• Runbook (deploy/README.md): a new section on alert emails through an SMTP service, using Resend as the example. The API key is piped from the clipboard over SSH, so it never shows on screen.

Nothing changes in the code. Everything below "Tech stack" stays as it was.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud