Merge pull request 'Tell a module where a mesh seat's holder is reached: ${seat:<seat>:reach} (hq ADR 0222, issue 190 — 1 of 3)' (#62) from fix/190-seat-reach into main

cmd/mesh-controller/plan.go

@@ -772,6 +772,13 @@ func renderingFor(ctx context.Context, open *stores, node string,
 	if err != nil {
 		return catalogue.Rendering{}, inventory.Node{}, err
 	}
+	// Where this machine reaches each mesh seat's holder, for ${seat:<seat>:reach} (novox/hq ADR
+	// 0222): the artifact store as this network reaches it, which the container runtime is told to
+	// trust (ADR 0082). The same address composed into every reference the mesh built.
+	var reach map[string]string
+	if artifactStore != "" {
+		reach = map[string]string{"mesh-artifact-store": artifactStore}
+	}
 	return catalogue.Rendering{
 		BusMembership: memberships[node],
 		Settings:      settings, Generators: gens, Grants: grants, Needed: needed, Ports: ports,
@@ -779,7 +786,7 @@ func renderingFor(ctx context.Context, open *stores, node string,
 		Machines: machines, Zones: zones,
 		Suffix: overlay.Suffix(), MeshRange: meshRange, TunnelInterface: overlay.Interface, Accounts: accounts, Foundation: foundation,
 		Kept: kept, Adopted: record.Adopted, OutwardLinks: outwardLinks,
-		Given: given, Taken: taken, Seats: seats, ArtifactStore: artifactStore, Built: built,
+		Given: given, Taken: taken, Seats: seats, ArtifactStore: artifactStore, SeatReach: reach, Built: built,
 		BusUsers: busUsers,
 	}, record, nil
 }