Add installation id for feature flags (#3052)

app/src/main/java/mihon/core/migration/migrations/InstallationIdMigration.kt

@@ -0,0 +1,18 @@
+package mihon.core.migration.migrations
+
+import eu.kanade.domain.base.BasePreferences
+import mihon.core.common.FeatureFlags
+import mihon.core.migration.Migration
+import mihon.core.migration.MigrationContext
+import kotlin.uuid.ExperimentalUuidApi
+
+class InstallationIdMigration : Migration {
+    override val version: Float = Migration.ALWAYS
+
+    @OptIn(ExperimentalUuidApi::class)
+    override suspend fun invoke(migrationContext: MigrationContext): Boolean {
+        val installationId = migrationContext.get<BasePreferences>()?.installationId() ?: return false
+        if (!installationId.isSet()) installationId.set(FeatureFlags.newInstallationId())
+        return true
+    }
+}

app/src/main/java/mihon/core/migration/migrations/Migrations.kt

@@ -8,4 +8,5 @@ val migrations: List<Migration>
         SetupLibraryUpdateMigration(),
         TrustExtensionRepositoryMigration(),
         CategoryPreferencesCleanupMigration(),
+        InstallationIdMigration(),
     )