feat: add make cleanup target

Assistant: codex
Assistant-Model: gpt-5.6-sol
Assistant-Session: 01a03397-4d51-7fd1-8ff2-946eb22ea2bc

workplans/ADHOC-2026-08-25.md

@@ -90,3 +90,20 @@ worker content behind a presentation gutter.
 - A real tmux/PTY integration fixture emits a cursor-positioned, mixed-case,
   bullet-framed worker message. It is durably attributed as `worker_output`
   while the operator echo is suppressed.
+
+## Make cleanup convenience target
+
+```task
+id: TAMQ-WP-ADHOC-2026-08-25-T04
+status: done
+priority: medium
+```
+
+Add a discoverable `make cleanup` target that performs the confirmed tamq-owned
+runtime cleanup while retaining durable message history.
+
+### Evidence
+
+- Plain `make` lists the cleanup target and its history-preservation contract.
+- A dry-run make invocation proves that the recipe delegates exactly to
+  `uv run tamq cleanup --yes`; verification does not close an operator session.