Bump Room version 29 -> 30 to clear stem-button default schema hash

Flipping the stem-button @ColumnInfo defaultValue from "HORN" /
"LIGHT_TOGGLE" to "NONE" in the previous commit changed Room's
identity hash for the AppSettings entity even though no column was
added or removed. The on-device DB was still at v29 with the prior
hash, so the next open() crashed:

  IllegalStateException: Room cannot verify the data integrity.
  Looks like you've changed schema but forgot to update the version

fallbackToDestructiveMigration handles the rebuild for testers on
the rolling pre-release; production will need a real migration when
this lands on main.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: eried

app/src/main/java/com/eried/eucplanet/data/db/AppDatabase.kt

@@ -8,7 +8,7 @@ import com.eried.eucplanet.data.model.TripRecord
 
 @Database(
     entities = [AppSettings::class, TripRecord::class, AlarmRule::class],
-    version = 29,
+    version = 30,
     exportSchema = false
 )
 abstract class AppDatabase : RoomDatabase() {