[management] Reuse a single cache store across all management server consumers (#5889)

* Add support for legacy IDP cache environment variable

* Centralize cache store creation to reuse a single Redis connection pool

Each cache consumer (IDP cache, token store, PKCE store, secrets manager,
EDR validator) was independently calling NewStore, creating separate Redis
clients with their own connection pools — up to 1400 potential connections
from a single management server process.

Introduce a shared CacheStore() singleton on BaseServer that creates one
store at boot and injects it into all consumers. Consumer constructors now
receive a store.StoreInterface instead of creating their own.

For Redis mode, all consumers share one connection pool (1000 max conns).
For in-memory mode, all consumers share one GoCache instance.

* Update management-integrations module to latest version

* sync go.sum

* Export `GetAddrFromEnv` to allow reuse across packages

* Update management-integrations module version in go.mod and go.sum

* Update management-integrations module version in go.mod and go.sum

management/server/cache/store.go

@@ -17,12 +17,24 @@ import (
 
 // RedisStoreEnvVar is the environment variable that determines if a redis store should be used.
 // The value should follow redis URL format. https://github.com/redis/redis-specifications/blob/master/uri/redis.txt
-const RedisStoreEnvVar = "NB_IDP_CACHE_REDIS_ADDRESS"
+const RedisStoreEnvVar = "NB_CACHE_REDIS_ADDRESS"
+
+// legacyIdPCacheRedisEnvVar is the previous environment variable used for IDP cache.
+const legacyIdPCacheRedisEnvVar = "NB_IDP_CACHE_REDIS_ADDRESS"
+
+const (
+	// DefaultStoreMaxTimeout is the default max timeout for the shared cache store.
+	DefaultStoreMaxTimeout = 7 * 24 * time.Hour
+	// DefaultStoreCleanupInterval is the default cleanup interval for the shared cache store.
+	DefaultStoreCleanupInterval = 30 * time.Minute
+	// DefaultStoreMaxConn is the default max connections for the shared cache store.
+	DefaultStoreMaxConn = 1000
+)
 
 // NewStore creates a new cache store with the given max timeout and cleanup interval. It checks for the environment Variable RedisStoreEnvVar
 // to determine if a redis store should be used. If the environment variable is set, it will attempt to connect to the redis store.
 func NewStore(ctx context.Context, maxTimeout, cleanupInterval time.Duration, maxConn int) (store.StoreInterface, error) {
-	redisAddr := os.Getenv(RedisStoreEnvVar)
+	redisAddr := GetAddrFromEnv()
 	if redisAddr != "" {
 		return getRedisStore(ctx, redisAddr, maxConn)
 	}
@@ -30,6 +42,15 @@ func NewStore(ctx context.Context, maxTimeout, cleanupInterval time.Duration, ma
 	return gocache_store.NewGoCache(goc), nil
 }
 
+// GetAddrFromEnv returns the redis address from the environment variable RedisStoreEnvVar or its legacy counterpart.
+func GetAddrFromEnv() string {
+	addr := os.Getenv(RedisStoreEnvVar)
+	if addr == "" {
+		addr = os.Getenv(legacyIdPCacheRedisEnvVar)
+	}
+	return addr
+}
+
 func getRedisStore(ctx context.Context, redisEnvAddr string, maxConn int) (store.StoreInterface, error) {
 	options, err := redis.ParseURL(redisEnvAddr)
 	if err != nil {