test(19.5): gate the plugin unit tests

- sociallogin: TestRegistry, TestNormalizeFrontendCallback,
  TestNormalizeReturnTo, TestCodes, TestEmailVerified, TestGothProviders,
  TestErrorMessages
- docker: the eighteen Postgres-backed plugin unit tests, TestNOAuth,
  TestRegisterComplete and TestStateCookie among them

scripts/check-phase19.5.sh

@@ -95,6 +95,9 @@ USER_ROOT_TESTS=(
 SOCIAL_TESTS=(
 	# Plan 02.
 	TestGothProvidersSmoke
+	# Plan 04: the Docker-free unit tests (D-03, D-06, D-08, D-11, D-17).
+	TestRegistry TestNormalizeFrontendCallback TestNormalizeReturnTo TestCodes
+	TestEmailVerified TestGothProviders TestErrorMessages
 )
 
 # demo stage (-short).
@@ -122,6 +125,13 @@ DOCKER_USER_ROOT_TESTS=(
 DOCKER_SOCIAL_TESTS=(
 	# Plan 02.
 	TestTracerSmoke TestFlowSmoke TestLinkSmoke TestSettingsOverrideSmoke
+	# Plan 04: one test per decision on Postgres (D-04, D-07, D-09, D-10,
+	# D-11, D-12, D-14, D-15, D-16, D-19, D-20, D-23).
+	TestStateCookie TestRoutes TestRouteMiddleware TestProvidersList
+	TestMatching TestNOAuth TestSoftDeleted TestInactiveAndBanned
+	TestRegistrationGates TestConsent TestBetaGate TestIdentityTokens
+	TestLink TestLinkTicket TestOAuthComplete TestTokenCookieMode
+	TestRegisterComplete TestSettings
 )
 
 # docs stage: names of consuming applications (split so this file does not