test(18.1-06): require the pgsub unit and Postgres tests in the phase 18.1 gate (task 3)

- plugins stage: ./models, ./contracts and root Docker-free names in pgsub
- postgres stage: every pgsub Postgres test by name

scripts/check-phase18.1.sh

@@ -68,15 +68,22 @@ CABANA_SHORT_TESTS=(
 
 # plugins stage: Docker-free suites (-short), per repository and package.
 # An empty list means the package is covered by vet and the -short run only.
-PGSUB_MODELS_TESTS=()
-PGSUB_CONTRACTS_TESTS=()
-PGSUB_ROOT_TESTS=()
+PGSUB_MODELS_TESTS=(TestSubscriptionChecks TestPlanPrices TestFeatureList)
+PGSUB_CONTRACTS_TESTS=(TestRegistry)
+PGSUB_ROOT_TESTS=(TestLangParity TestAdminLangParity TestAdminCatalog TestRedirectURLs TestFixtureAbsentFromProduction)
 PGSTRIPE_ROOT_TESTS=(TestSDKPin)
 PGSTRIPE_SUBS_TESTS=()
 
 # postgres stage: testcontainers suites, per repository and package.
 PG_CABANA_TESTS=(TestTaglistFieldSmoke TestReorderFlatSmoke TestReorderPostgres)
-PG_PGSUB_TESTS=(TestSubscriptionsTracer)
+PG_PGSUB_TESTS=(
+	TestSubscriptionsTracer TestSubscriptionsCheckout TestSubscriptionsCoreSmoke TestPlanJSONBColumns
+	TestAdminPlansSmoke TestAdminSubscriptionsSmoke TestCustomerAPISmoke
+	TestApplyEvents TestClaimEventConcurrent
+	TestUserSubscribable
+	TestBaselineSchema
+	TestServiceAPI TestAdminSyncActions TestCustomerAPIAuthz
+)
 PG_PGSTRIPE_ROOT_TESTS=()
 PG_PGSTRIPE_SUBS_TESTS=(TestHostSubscriptionFlow)