Finish SAND-WP-0002: remote smoke, podman-compose, HTTP stub

- T10 smoke passed on CoulombCore (sand-boxer self-deploy, sandbox 4e542c51)
- Add e2e smoke compose, scripts/smoke-compose-e2e.sh, make smoke-remote
- Support SANDBOXER_COMPOSE_CMD for podman-compose hosts
- FastAPI v0 stub at sandboxer.api.app; migration gaps doc
- Mark workplan finished (all 10 tasks done)

workplans/SAND-WP-0002-meta-framework-foundation.md

@@ -4,11 +4,11 @@ type: workplan
 title: "Meta-framework foundation and first extension"
 domain: infotech
 repo: sand-boxer
-status: active
+status: finished
 owner: codex
 topic_slug: custodian
 created: "2026-06-22"
-updated: "2026-06-22"
+updated: "2026-06-23"
 state_hub_workstream_id: "1cdfc6ba-6cd2-4d10-a78f-8fa5996ad567"
 ---
 
@@ -216,7 +216,7 @@ state_hub_task_id: "e2b089b2-3742-4feb-86c3-788a1f6ffb81"
 
 ```task
 id: SAND-WP-0002-T10
-status: todo
+status: done
 priority: medium
 state_hub_task_id: "a95755fb-cda6-4741-847c-78ef7e073cab"
 ```
@@ -234,8 +234,9 @@ End-to-end proof on CoulombCore or sandboxer01 (when reachable):
 Record gaps for wise-validator migration (SAND-WP-0003) and `the-custodian`
 shim (SAND-WP-0004).
 
-Runbook published at `docs/runbooks/profile-compose-e2e.md`. Remote host smoke
-test (steps 1–4) pending operator run against CoulombCore/sandboxer01.
+Remote smoke passed on CoulombCore (`92.205.130.254`, `podman-compose`):
+`sandbox_id=4e542c51` via `./scripts/smoke-compose-e2e.sh` (2026-06-23).
+Migration gaps recorded in `docs/migration-gaps.md`.
 
 ---