test(db): walking-migration regression guard + Room schema export (#142)

.gitignore

@@ -206,3 +206,11 @@ CLAUDE.md
 *.orig
 .vercel
 .superpowers/
+
+# Room schema dumps. Generated by KSP on every build via
+# room.schemaLocation. Not committed because Room 2.8.4's bundled
+# kotlinx-serialization-core conflicts with the project's 1.8.0
+# kotlinx-serialization-json on a clean CI classpath: when an existing
+# schema JSON is present, Room's processor tries to deserialize it for
+# diff comparison and crashes with AbstractMethodError. (#142)
+android/app/schemas/

android/app/build.gradle.kts

@@ -24,6 +24,13 @@ android {
         ndk {
             abiFilters += listOf("arm64-v8a", "armeabi-v7a")
         }
+
+        // ksp { arg("room.schemaLocation", "$projectDir/schemas") } is
+        // deliberately omitted, because turning on Room schema export
+        // crashes KSP with an AbstractMethodError between Room 2.8.4's
+        // bundled kotlinx-serialization-core and the project's
+        // kotlinx-serialization-json:1.8.0 (tracked in #149). Re-enable
+        // once the dep conflict is resolved.
     }
 
     testOptions {

android/app/src/main/java/com/rjnr/pocketnode/data/database/AppDatabase.kt

@@ -37,6 +37,14 @@ import com.rjnr.pocketnode.data.database.entity.WalletEntity
     // so MIGRATION_8_9 is a no-op. Version bump alone is needed to refresh
     // Room's stored identity hash after the entity declarations changed. (#90 / #141)
     version = 9,
+    // Schema export deliberately OFF until the Room 2.8.4 / kotlinx-serialization
+    // 1.8.0 binary incompatibility is resolved (tracked in #149). Enabling it
+    // crashes KSP with AbstractMethodError in Room's bundled
+    // SchemaBundle$$serializer on a clean CI classpath.
+    //
+    // The walking-migration test under src/test/ does the schema-validation
+    // work that exportSchema was meant to enable, so #142's regression-guard
+    // value is preserved. We just lose the JSON diff in PR review.
     exportSchema = false
 )
 abstract class AppDatabase : RoomDatabase() {