Phase 3 closed — the store and broker are ordinary modules, issue 051 fixed

Marks WBS 3.2/3.3/3.4 done and resolves issue 051: the foundation's store and
broker are adopted in place as the postgres and lavinmq modules, upgradeable
through their stated windows, source-tracked by status. A bare-metal mesh runs
one postgres and one lavinmq, proven 22/22 in the one-node lab. The two follow-up
gaps are tracked as issues 054 and 055.

Claude-Session: https://claude.ai/code/session_01D6qtiYU3P9jk3pnAXyAFyx

04-ISSUES/051-the-mesh-cannot-update-what-it-depends-on/00-report.md

@@ -1,8 +1,8 @@
 ---
-status: open
+status: fixed
 opened: 2026-09-14
-located-in: []
-fixed-by:
+located-in: [mesh-host, mesh-catalog]
+fixed-by: mesh-host 56124c3; mesh-catalog 5e4dc37; mesh-lab 440e265
 amended-design:
 ---
 
@@ -117,3 +117,17 @@ broker upgrade is the mesh asking the machine to replace the thing the request a
 | The mesh can say its substrate is out of date | The store's source moves and `status` reports it behind, the way it does for any module. |
 | The mesh can deliver a substrate update | A store or broker is upgraded on a running mesh and the control plane is answering afterwards, with its records intact. |
 | Nothing runs twice without a reason | A mesh with one machine runs one postgres unless somebody asked for two. |
+
+## Resolution
+
+The foundation's store and broker are adopted in place as the ordinary `postgres` and `lavinmq`
+modules (WBS Phase 3). Each module declares the container the foundation raised — the same name,
+image, ports, volumes and args — so the applier reconciles it rather than raising a second server;
+`mesh-host`'s `InstallStore` (phase3.go) carries in the genesis credentials the mesh cannot invent.
+The servers bind mesh-wide so consumers reach them, and their provisioners run host-networked. An
+upgrade of each is proven through its stated window — the store's a pool reconnect, the broker's the
+harder case of recreating the bus the push travels over — and `status` now reports both as ordinary
+modules that can be behind their source. A mesh built from bare metal runs one postgres and one
+lavinmq, proven 22/22 in the one-node lab. Two follow-ups are tracked: [054](../054-the-adopted-store-and-broker-are-open-before-the-filter/00-report.md)
+(the pre-filter exposure window) and [055](../055-the-adopted-store-and-broker-may-be-reachable-on-one-node-only/00-report.md)
+(multi-node reachability).