test(19.3-05): cooler caches, rate-limit parity, Install and after-commit purge

- miniredis v2.40.0 as a test-only dependency (approved at the Task 4 check)
- memory and Redis cache suites, Flush limited to <prefix>cache:
- one parity table through surf.MemoryStore, miniredis and real Redis
- Install, FromApp and site_cache validation; Postgres after-commit purge
- gate: cooler names in the go and docker stages

scripts/check-phase19.3.sh

@@ -91,11 +91,32 @@ ATTACH_TESTS=(
 	TestPublicURLValidation
 )
 
+# cooler: caches, rate-limit parity with surf.MemoryStore (miniredis),
+# Install, FromApp and the site-cache purger.
+COOLER_TESTS=(
+	TestMemoryCache TestMemoryCacheTTL TestMemoryCacheBounded
+	TestMemoryIncrementConcurrent TestRememberDegrades
+	TestRedisCache TestRedisFlushOnlyPrefix
+	TestRateLimitParity
+	TestRateLimitConcurrentNeverExceedsMax
+	TestRateLimitFallbackOnError TestRateLimitKeyPrefix
+	TestInstallConfigErrors TestInstallPingWarning TestInstallReusesFromApp
+	TestFromAppLazy TestInstallSiteCacheValidation
+	TestSiteCachePurgeConfig TestSiteCachePurgeRequest TestSiteCacheFromApp
+)
+
 # docker stage: testcontainers suites.
 DOCKER_CABANA_TESTS=(TestReorderHookRunsInTx TestReorderHookErrorRollsBack TestReorderWithoutHookUnchanged)
 DOCKER_ATTACH_TESTS=(
 	TestStoreDiskExtension
 )
+# Postgres for the after-commit purge, redis:7-alpine for the rest.
+DOCKER_COOLER_TESTS=(
+	TestRateLimitParityDocker
+	TestRedisCacheDocker
+	TestSiteCacheAfterCommitOnly
+	TestSiteCacheFailureNeverFails
+)
 
 usage() {
 	cat >&2 <<'EOF'
@@ -363,6 +384,7 @@ run_go() {
 	go_named "$ROOT" ./internal/build -short "${BUILD_TESTS[@]}"
 	go_named "$ROOT" ./modules/lagoon/attach -short "${ATTACH_TESTS[@]}"
 	go_named "$ROOT" ./modules/lagoon/attach "-short -tags summercms_s3" "${ATTACH_TESTS[@]}"
+	go_named "$ROOT" ./modules/cooler -short "${COOLER_TESTS[@]}"
 	echo "phase19.3 go passed"
 }
 
@@ -377,6 +399,7 @@ run_docker() {
 	fi
 	go_named "$ROOT" ./modules/cabana "-timeout 20m" "${DOCKER_CABANA_TESTS[@]}"
 	go_named "$ROOT" ./modules/lagoon/attach "-timeout 20m" "${DOCKER_ATTACH_TESTS[@]}"
+	go_named "$ROOT" ./modules/cooler "-timeout 20m" "${DOCKER_COOLER_TESTS[@]}"
 	echo "phase19.3 docker passed"
 }