fix(room): Kotlin 2.1/KSP 2.0 환경에서 KSP 오류 해결을 위해 Room 2.7.0으로 업그레이드

Kotlin을 2.1.21, KSP를 2.1.21-2.0.2로 올린 뒤 발생한
`unexpected jvm signature V` 예외를 해결하기 위해 Room(compiler, runtime, ktx, rxjava3)
버전을 2.6.1 → 2.7.0으로 업그레이드.

빌드가 정상 완료되며 KSP 태스크도 성공적으로 수행됨을 확인함.

app/build.gradle

@@ -181,10 +181,10 @@ dependencies {
     implementation "com.android.billingclient:billing-ktx:6.2.0"
 
     // ROOM
-    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"
+    ksp "androidx.room:room-compiler:2.7.0"
+    implementation "androidx.room:room-ktx:2.7.0"
+    implementation "androidx.room:room-runtime:2.7.0"
+    implementation "androidx.room:room-rxjava3:2.7.0"
 
     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 = '2.0.21'
+        kotlin_version = '2.1.21'
     }
     repositories {
         google()
@@ -18,8 +18,8 @@ buildscript {
 plugins {
     id 'com.android.application' version '8.7.2' apply false
     id 'com.android.library' version '8.7.2' 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.jetbrains.kotlin.android' version '2.1.21' apply false
+    id 'com.google.devtools.ksp' version '2.1.21-2.0.2' apply false
 
     id "org.jlleitschuh.gradle.ktlint" version "11.2.0"
     id 'com.google.gms.google-services' version '4.3.15' apply false