chore(regall): bootstrap phase state (STATUS/BACKLOG/REVIEW/JOURNAL-regall)

machine-docs/JOURNAL-regall.md

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+# JOURNAL — phase `regall`
+
+## 2026-06-17 — Phase bootstrap + sweep start
+
+### Context
+Phase `prevb` completed with DONE at b6f526a. The prevb change introduced:
+- Dynamic upgrade-base resolution: last-green (warm canonical) → main-tip (ref) → skip
+- `previous/` overlay mechanism (base-only, version-guarded)
+- Environmental vs version-specific overlay split
+
+There are NO warm canonical registry records on the server (`/var/lib/ci-warm/` has only
+keycloak/traefik reconciler dirs, no `canonical.json`). So for all recipes, the post-prevb base
+resolution will use **main-tip ref** as the upgrade base (kind=ref), unless:
+- EXPECTED_NA[upgrade] is declared (bluesky-pds → skip)
+- UPGRADE_BASE_VERSION is set (plausible → version 3.0.1+v2.0.0)
+
+This is the key structural difference from pre-prevb: old code used `lifecycle.previous_version(recipe)`
+(the previous published tag), new code uses main-tip commit ref for most recipes.
+
+Three prevb spot-checks already confirmed green with post-prevb code:
+- cryptpad PR#5: kind=ref main-tip 36ee3451; upgrade=pass
+- keycloak PR#3: kind=ref main-tip 12ac6db8; upgrade=pass (prune-orphans safe-skip)
+- hedgedoc PR#1: kind=ref main-tip 09bf4d54; upgrade=pass
+
+Remaining 18 recipes to sweep.
+
+### Sweep strategy
+- Batch ≤3 concurrent Drone builds via !testme on open PRs
+- Create trivial "chore: regall test trigger" PRs for recipes with no open PRs
+- Monitor Drone build numbers, collect results.json levels
+- Compare to baseline table