Make local UI setup truthful and rerunnable

docs/modules/platform/platform-service.md

@@ -263,6 +263,11 @@ reconfiguration checks.
 Current runtime behavior:
 - Authoritative wizard state is persisted in `platform.setup_sessions` via
   migration `063_PlatformSetupSessions.sql`.
+- Installation-scoped environment settings and the `SetupComplete` marker now
+  converge through `platform.environment_settings` keyed only by `key`.
+  Migration `064_EnvironmentSettingsInstallationScopeConvergence.sql` upgrades
+  older compose-created tables that still used the legacy `(tenant_id, key)`
+  primary key.
 - The persisted store keeps only non-sensitive draft configuration plus step
   state, timestamps, and check results. Secret material is still expected to be
   staged through a secret authority rather than stored in wizard session state.