Add audit command and outbox foundations

README.md

@@ -7,6 +7,14 @@ This repository owns the live `audit_log` table, audit API route
 contributions, and the target boundary for future audit sink/export capability
 work.
 
+It also owns the audit command/event separation and production delivery
+foundation:
+
+- `govoplan_audit.backend.commands` defines an in-process command bus for
+  requested work.
+- `govoplan_audit.backend.outbox` persists governed platform events in
+  `audit_outbox_events` and dispatches pending rows with retry metadata.
+
 See [docs/AUDIT_TRACE_CONTEXT.md](docs/AUDIT_TRACE_CONTEXT.md) for the standard
 operational context fields used by admin, installer, and module lifecycle audit
 entries.