Architecture Decision Records (ADR) auto-generation and tracking

[arnaudlh]

Description

The manifesto positions ADRs, reference architectures, and security standards as the "governing ledger" in an agentic model. Git-ape currently generates architecture diagrams but does not produce or track Architecture Decision Records.

Scope

1. ADR generation — After each deployment, auto-generate an ADR documenting: what was deployed, why (requirements), alternatives considered, trade-offs accepted (from WAF review), and the final architecture diagram.
2. ADR directory — .azure/adrs/ with numbered ADR files following the standard format (Title, Status, Context, Decision, Consequences).
3. ADR index — Auto-maintained INDEX.md listing all ADRs with status.
4. ADR references in deployments — Each deployment's metadata.json links to its ADR.
5. ADR evolution — When a deployment is updated or destroyed, the ADR is amended with the change rationale.

Acceptance Criteria

• Deployment pipeline generates an ADR after successful deployment.
• ADRs follow a consistent template (number, title, status, context, decision, consequences).
• ADR index is auto-maintained.
• Deployment metadata references the associated ADR.
• Updated deployments append to the existing ADR.