The runtime's credential belongs to the account it runs as (hq to-be 38 WP3)

The runtime's process is composed `user: <account>` where the node has one, and its broker file was
root's at 0600: a credential the process could not read. Composed in the declaration rather than
said in the manifest, because a manifest cannot say ${machine:account} safely — a node with no
account has nothing to resolve it to — and there the runtime runs as root and the file stays root's.

internal/catalogue/declaration.go

@@ -508,7 +508,17 @@ func (r Resolution) compose(with Rendering, owner map[string]string,
 				return nil, fmt.Errorf(
 					"%s needs a secret called %q and none was made for it", m.Module, name)
 			}
-			first = append(first, ownedBy(m.SecretsOwner, map[string]any{
+			// The runtime's credential belongs to the account the runtime runs as (novox/hq ADR 0175,
+			// to-be 38 WP3): its process is composed `user: <account>` where the node has one, and a
+			// root-owned 0600 file is one that process cannot read. Composed here rather than said in
+			// the manifest, because a manifest cannot say ${machine:account} safely — a node with no
+			// account has nothing to resolve it to, and then the runtime runs as root and the file
+			// stays root's.
+			owner := m.SecretsOwner
+			if m.Module == RuntimeModule && r.Account != "" {
+				owner = r.Account
+			}
+			first = append(first, ownedBy(owner, map[string]any{
 				"id": NeedID(name), "type": "file", "path": m.OwnSecrets[name].Path, "sealed": sealed,
 			}))
 		}