implemented NATS event bus, websocket hub upgrade, and audit log

internal/config/config.go

@@ -25,6 +25,9 @@ type Config struct {
 	OIDCClientID     string
 	OIDCClientSecret string
 
+	// Event bus
+	NATSUrl string
+
 	// Federation
 	InstanceURL  string
 	InstanceName string
@@ -39,6 +42,7 @@ func Load() (*Config, error) {
 		RepoRoot: getEnv("REPO_ROOT", "/var/lib/forgebucket/repos"),
 		Debug:    getEnvBool("DEBUG", false),
 
+		NATSUrl:      getEnv("NATS_URL", ""),
 		InstanceURL:  getEnv("INSTANCE_URL", ""),
 		InstanceName: getEnv("INSTANCE_NAME", "ForgeBucket"),
 	}