fix(ci): unbreak static_tests for new projects

.ci/test/static/run

@@ -8,7 +8,9 @@ set -eo pipefail
 #
 
 # Run composer install to get the vendor directory
-composer install --no-ansi --no-interaction --optimize-autoloader --no-progress
+# ext-redis is ignored because the CI image doesn't ship it; Object Cache Pro
+# requires it, but nothing is executed during static analysis.
+composer install --ignore-platform-req=ext-redis --no-ansi --no-interaction --optimize-autoloader --no-progress
 
 # Delete and reset the web directory
 # This is necessary so that third-party

.circleci/config.yml

@@ -234,7 +234,11 @@ workflows:
   build_deploy_and_test:
     jobs:
       - configure_env_vars
-      - static_tests
+      # static_tests runs composer install, which downloads premium plugins
+      # from their registries, so it needs the same credentials as build_php.
+      - static_tests:
+          context:
+            - plugin_keys
       - build_yarn
       - build_php:
           context: