Auto-configure Micrometer's Lettuce latency metrics

Add auto-configuration support to export Lettuce latency metrics.

See gh-27865

spring-boot-project/spring-boot-docs/build.gradle

@@ -223,6 +223,7 @@ tasks.withType(org.asciidoctor.gradle.jvm.AbstractAsciidoctorTask) {
 		attributes	"embedded-mongo-version": versionConstraints["de.flapdoodle.embed:de.flapdoodle.embed.mongo"],
 					"jetty-version": versionConstraints["org.eclipse.jetty:jetty-server"],
 					"jooq-version": versionConstraints["org.jooq:jooq"],
+					"lettuce-version": versionConstraints["io.lettuce:lettuce-core"],
 					"spring-amqp-version": versionConstraints["org.springframework.amqp:spring-amqp"],
 					"spring-batch-version": versionConstraints["org.springframework.batch:spring-batch-core"],
 					"spring-boot-version": project.version,

spring-boot-project/spring-boot-docs/src/docs/asciidoc/actuator/metrics.adoc

@@ -1068,6 +1068,14 @@ Long task timers require a separate metric name and can be stacked with a short
 
 
 
+[[actuator.metrics.supported.redis]]
+==== Redis Metrics
+
+Auto-configuration will register a `MicrometerCommandLatencyRecorder` for the auto-configured `LettuceConnectionFactory`.
+For more details refer to {lettuce-docs}#command.latency.metrics.micrometer[Micrometer Metrics] section of the Lettuce documentation.
+
+
+
 [[actuator.metrics.registering-custom]]
 === Registering Custom Metrics
 To register custom metrics, inject `MeterRegistry` into your component:

spring-boot-project/spring-boot-docs/src/docs/asciidoc/attributes.adoc

@@ -105,3 +105,4 @@
 :micrometer-concepts-docs: {micrometer-docs}/concepts
 :micrometer-registry-docs: {micrometer-docs}/registry
 :tomcat-docs: https://tomcat.apache.org/tomcat-9.0-doc
+:lettuce-docs: https://lettuce.io/core/{lettuce-version}/reference/index.html