fix(build): Room KAPT→KSP 마이그레이션 및 configuration cache 비활성화로 Kotlin 2.0 빌드 오류 해결

- Room을 2.6.1로 업데이트하고 KAPT를 KSP로 전환
- room-rxjava3 의존성 추가(RxJava3 반환 타입 지원)
- ObjectBox 플러그인과 충돌 회피를 위해 configuration cache 비활성화
- AGP 8.4.2 + Kotlin 2.0.21 환경에서 빌드 성공 확인

app/build.gradle

@@ -4,7 +4,7 @@ plugins {
     id 'com.google.gms.google-services'
     id 'com.google.android.gms.oss-licenses-plugin'
 
-    id 'kotlin-kapt'
+    id 'com.google.devtools.ksp'
     id 'kotlin-parcelize'
     id 'org.jlleitschuh.gradle.ktlint'
 
@@ -181,9 +181,10 @@ dependencies {
     implementation "com.android.billingclient:billing-ktx:6.2.0"
 
     // ROOM
-    kapt "androidx.room:room-compiler:2.5.0"
-    implementation "androidx.room:room-ktx:2.5.0"
-    implementation "androidx.room:room-runtime:2.5.0"
+    ksp "androidx.room:room-compiler:2.6.1"
+    implementation "androidx.room:room-ktx:2.6.1"
+    implementation "androidx.room:room-runtime:2.6.1"
+    implementation "androidx.room:room-rxjava3:2.6.1"
 
     implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.6.4"
 

build.gradle

@@ -1,7 +1,7 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 buildscript {
     ext {
-        kotlin_version = '1.8.0'
+        kotlin_version = '2.0.21'
     }
     repositories {
         google()
@@ -17,9 +17,10 @@ buildscript {
 }
 
 plugins {
-    id 'com.android.application' version '8.1.1' apply false
-    id 'com.android.library' version '8.1.1' apply false
-    id 'org.jetbrains.kotlin.android' version '1.8.20' apply false
+    id 'com.android.application' version '8.4.2' apply false
+    id 'com.android.library' version '8.4.2' apply false
+    id 'org.jetbrains.kotlin.android' version '2.0.21' apply false
+    id 'com.google.devtools.ksp' version '2.0.21-1.0.25' apply false
 
     id "org.jlleitschuh.gradle.ktlint" version "11.2.0"
     id 'com.google.gms.google-services' version '4.3.15' apply false

gradle.properties

@@ -20,7 +20,7 @@ kotlin.code.style=official
 # Enables namespacing of each library's R class so that its R class includes only the
 # resources declared in the library itself and none from the library's dependencies,
 # thereby reducing the size of the R class for that library
-org.gradle.configuration-cache=true
+org.gradle.configuration-cache=false
 android.nonTransitiveRClass=true
 android.defaults.buildfeatures.buildconfig=true
 android.enableJetifier=true

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
 #Sun Jul 23 18:26:44 KST 2023
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.0.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.6-bin.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists