claim(prevb): M1 — dynamic base + previous/ + discourse migration; discourse upgrade GREEN locally (head=official 3.5.3, sidekiq pruned)

machine-docs/JOURNAL-prevb.md

@@ -50,3 +50,23 @@ B5 e2e launched on cc-ci (/root/prevb-deploy @ bb2e3c6), STAGES=install,upgrade,
 (bitnamilegacy:3.5.0), env overlay provided. Base now in slow Rails cold boot (15-25min). Polling ~5min.
 (lint rung fail R011 = recipe-level, a rung not a gate; prepull skipped on the known sidekiq-depends-on
 config rc=15 — non-fatal.)
+
+## 2026-06-17T00:40Z — M1 GREEN locally; claiming
+
+discourse install,upgrade e2e GREEN (2nd run, after the prune fix). Evidence in run-prevb-disc2.log on
+cc-ci /root/prevb-deploy. The dynamic main-tip base worked first try (kind=ref f87c612d) — crucial,
+because main (0.8.1+3.5.0) is AHEAD of the newest published tag (0.7.0+3.3.1), so the OLD vers[-2]
+default (=0.6.3) would have been the wrong predecessor entirely. The upgrade moved
+0.8.1+3.5.0 (bitnamilegacy, main-tip) → 1.0.0+3.5.3 (official, PR head), chaos-version=ae5a8180+U.
+
+**The one real bug found+fixed (WHY):** first run, `test_head_runs_official_image` PASSED (head app =
+official 3.5.3 — the leak is gone) but `test_sidekiq_service_dropped` FAILED: `docker stack deploy`
+(what `abra app deploy` runs) only adds/updates services, it does NOT prune ones the new compose dropped,
+so the base's sidekiq orphaned on the old image. This is a swarm mechanic, not a head-deploy failure, but
+it means the deployed stack didn't faithfully reflect the head. Fix = `prune_orphan_services` in
+perform_upgrade: reconcile the live stack to the head compose's `config --services` set (remove orphans).
+Faithful (deployed stack == head), no-op when service sets match / compose unresolvable, weakens nothing.
+
+Decided to CLAIM with the e2e green + image/sidekiq proof and leave the deliberately-broken-head teeth
+probe to the Adversary's cold acceptance (its explicit M1 check; I can't push a broken commit to the
+recipe mirror per guardrails). STATUS spells out where the teeth hold so they know where to probe.