add Redis cache and some clean up

- update and cleanup in README.md
- update getIdentity to throw response exception with 401 in JwtService
- update http files to use identity from env
- add cacheable to getIdentityFromDevice in DeviceRegistryService
- add RedisCacheConfiguration
- add CacheProperty
- set up cache property
- set up data redis cache

build.gradle.kts

@@ -18,6 +18,8 @@ dependencies {
     implementation(hlaeja.micrometer.registry.influx)
     implementation(hlaeja.library.hlaeja.common.messages)
     implementation(hlaeja.springboot.starter.actuator)
+    implementation(hlaeja.springboot.starter.cache)
+    implementation(hlaeja.springboot.starter.redis)
     implementation(hlaeja.springboot.starter.webflux)
 
     runtimeOnly(hlaeja.jjwt.impl)