Update grace-datastore-core to remove dependency on javassist

Closes gh-81

Author: rainboyan

buildSrc/src/main/groovy/grace.build.common.gradle

@@ -41,6 +41,7 @@ dependencies {
     testImplementation libs.junit.jupiter.engine
     testImplementation libs.junit.platform.runner
     testImplementation libs.spock.core
+    testImplementation libs.javassist
 
     documentation libs.javaparser
     documentation libs.groovy.ant

grace-datastore-core/build.gradle

@@ -13,7 +13,7 @@ dependencies {
     api libs.spring.beans
     api libs.spring.tx
     implementation libs.caffeine
-    implementation libs.javassist
+    compileOnly libs.javassist
 
     testImplementation project(":grace-datastore-gorm")
     testImplementation libs.spring.context