Adjust ACL behavior for "none" mode and make query cache optional

This commit allows skipping authentication, permission checks, and certain filters (e.g., deletions, expirations) when the ACL mode is set to "none" (open relay mode). It also introduces a configuration option to disable query caching to reduce memory usage. These changes improve operational flexibility for open relay setups and resource-constrained environments.

app/handle-nip43_test.go

@@ -54,7 +54,7 @@ func setupTestListener(t *testing.T) (*Listener, *database.D, func()) {
 	}
 
 	// Configure ACL registry
-	acl.Registry.Active.Store(cfg.ACLMode)
+	acl.Registry.SetMode(cfg.ACLMode)
 	if err = acl.Registry.Configure(cfg, db, ctx); err != nil {
 		db.Close()
 		os.RemoveAll(tempDir)
@@ -378,7 +378,7 @@ func TestHandleNIP43InviteRequest_ValidRequest(t *testing.T) {
 	// Add admin to config and reconfigure ACL
 	adminHex := hex.Enc(adminPubkey)
 	listener.Server.Config.Admins = []string{adminHex}
-	acl.Registry.Active.Store("none")
+	acl.Registry.SetMode("none")
 	if err = acl.Registry.Configure(listener.Server.Config, listener.Server.DB, listener.ctx); err != nil {
 		t.Fatalf("failed to reconfigure ACL: %v", err)
 	}