fix container healthcheck false negative and register endpoints tables

curl --fail exited nonzero on the login probe's 400 before the body reached grep VALIDATION_ERROR, so the healthcheck always failed and the container reported unhealthy while the app was fine. Drop --fail so grep decides pass/fail. Also register endpoint tables in PLUGIN_TABLE_OWNERS so plugin migrations can resolve their owned metadata.

shopdb/plugins/alembic_template.py

@@ -51,6 +51,7 @@ PLUGIN_TABLE_OWNERS: dict[str, Iterable[str]] = {
     'computers':     ('computertypes', 'computers', 'computerinstalledapps',
                       'accessprotocols', 'computeraccess'),
     'employees':     ('directoryemployees',),
+    'endpoints':     ('endpointstates', 'endpointevents'),
     'geenforce':     ('manifestscopes', 'manifestentries', 'manifestentrypctypes',
                       'manifestentryhostnames', 'manifestentrymachinenumbers',
                       'manifestinusechecks', 'manifestinusecheckprocesses',