docs(audit): align documentation with post-remediation backend reality

- Update data model enums to match backend models
- Update API reference auth requirements
- Add dispute module references and warning blocks
- Add 2026-05-24 audit remediation callout to Overview
- Generate task breakdowns and audit artifacts
- Add doc alignment report (.taskmaster/reports/)

Taskmaster/Tasks/task-1-3.md

@@ -0,0 +1,35 @@
+---
+taskmaster_id: "1.3"
+status: "done"
+priority: "medium"
+depends_on: []
+parent_id: "1"
+source: "taskmaster"
+generated_at: "2026-05-24T07:15:25.199Z"
+---
+
+# 1.3 - Fix chat, delivery, dispute, OAuth, purchase request, referral, registration, and seller-offer diagrams
+
+- [x] 1.3 - Fix chat, delivery, dispute, OAuth, purchase request, referral, registration, and seller-offer diagrams #taskmaster #priority/medium #status/done 🔼 🆔 tm-1-3
+
+## Metadata
+
+| Field | Value |
+| --- | --- |
+| Taskmaster ID | 1.3 |
+| Status | done |
+| Priority | medium |
+| Dependencies | None |
+| Parent | 1 - Stabilize Mermaid diagram rendering across documentation vault |
+
+## Description
+
+Clean the remaining Mermaid sequence diagrams with invalid or ambiguous syntax.
+
+## Details
+
+Split multi-recipient arrows, remove parser-conflicting semicolon/expression text, and keep intent unchanged.
+
+## Verification
+
+Full vault mmdc parser sweep across all Mermaid blocks.