Iter 9c: docs (DESIGN.md + JOURNAL.md)

DESIGN.md:
- CLI block: add `ail run`.
- Smoke-test list: add list_map.ail.json (the dogfood example).

JOURNAL: append Iter 9 entry covering the dogfood result, two
friction points surfaced (single-arg fn-type pretty-print parens;
absence of a sequencing operator), the `ail run` CLI helper, and a
ranked Iter 10 plan with three candidates (polymorphism, `;`, GC).
Tentative pick is (2) `;` next, (1) polymorphism for Iter 11.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docs/DESIGN.md

@@ -226,6 +226,7 @@ ail render <module>              — JSON → pretty-print
 ail parse <module.ail>           — pretty-print → JSON (for bootstrapping)
 ail emit-ir <module>             — writes .ll
 ail build <module>               — full pipeline → binary
+ail run <module>                 — build + execute (tempdir), passthrough exit code
 ```
 
 ## Verification and correctness (across cycles)
@@ -282,3 +283,5 @@ Pipeline regression smoke tests:
 - `examples/list.ail.json` → prints 42 (ADTs + match).
 - `examples/hof.ail.json` → prints 42 (first-class fn-refs, indirect call).
 - `examples/closure.ail.json` → prints 42 (lambda capturing a let-bound var).
+- `examples/list_map.ail.json` → prints 2/4/6 (ADTs + closure + recursive
+  HOF + IO; the dogfood smoke test).