Merge remote valkeydependency branch and resolve conflicts

Resolved conflicts in:
- docs/valkey-configuration.md: Kept local comprehensive documentation
- HaGatewayProviderModule.java: Merged both changes - kept cluster stats observers and monitor configuration providers along with Valkey providers

Author: hpopuri2

gateway-ha/src/main/java/io/trino/gateway/ha/module/HaGatewayProviderModule.java

@@ -13,6 +13,7 @@
  */
 package io.trino.gateway.ha.module;
 
+import com.google.common.collect.ImmutableList;
 import com.google.inject.AbstractModule;
 import com.google.inject.Provides;
 import com.google.inject.Scopes;
@@ -37,6 +38,7 @@
 import io.trino.gateway.ha.config.DataStoreConfiguration;
 import io.trino.gateway.ha.config.GatewayCookieConfigurationPropertiesProvider;
 import io.trino.gateway.ha.config.HaGatewayConfiguration;
+import io.trino.gateway.ha.config.MonitorConfiguration;
 import io.trino.gateway.ha.config.OAuth2GatewayCookieConfigurationPropertiesProvider;
 import io.trino.gateway.ha.config.RoutingRulesConfiguration;
 import io.trino.gateway.ha.config.RulesExternalConfiguration;
@@ -54,6 +56,7 @@
 import io.trino.gateway.ha.router.QueryHistoryManager;
 import io.trino.gateway.ha.router.ResourceGroupsManager;
 import io.trino.gateway.ha.router.RoutingGroupSelector;
+import io.trino.gateway.ha.router.RoutingManager;
 import io.trino.gateway.ha.router.ValkeyDistributedCache;
 import io.trino.gateway.ha.security.AuthorizationManager;
 import io.trino.gateway.ha.security.LbAuthorizer;
@@ -68,6 +71,8 @@
 import org.jdbi.v3.core.Jdbi;
 import org.jdbi.v3.sqlobject.SqlObjectPlugin;
 
+import java.util.List;
+
 import static com.google.inject.multibindings.Multibinder.newSetBinder;
 import static io.airlift.jaxrs.JaxrsBinder.jaxrsBinder;
 import static io.trino.gateway.ha.config.ClusterStatsMonitorType.INFO_API;
@@ -202,6 +207,25 @@ public static ClusterStatsMonitor getClusterStatsMonitor(@ForMonitor HttpClient
         };
     }
 
+    @Provides
+    @Singleton
+    public List<TrinoClusterStatsObserver> getClusterStatsObservers(
+            RoutingManager mgr,
+            BackendStateManager backendStateManager)
+    {
+        return ImmutableList.<TrinoClusterStatsObserver>builder()
+                .add(new HealthCheckObserver(mgr))
+                .add(new ClusterStatsObserver(backendStateManager))
+                .build();
+    }
+
+    @Provides
+    @Singleton
+    public MonitorConfiguration getMonitorConfiguration()
+    {
+        return configuration.getMonitor();
+    }
+
     @Provides
     @Singleton
     public ValkeyConfiguration getValkeyConfiguration()