feat(database): enable WAL connection pool for parallel reads

Room 3.0.0-alpha04 adds setMultipleConnectionPool(). Enable it with
4 readers / 1 writer to allow concurrent read operations (paging,
multiple Flow collectors) without contention.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

core/database/src/commonMain/kotlin/org/meshtastic/core/database/MeshtasticDatabase.kt

@@ -120,7 +120,9 @@ abstract class MeshtasticDatabase : RoomDatabase() {
     companion object {
         /** Configures a [RoomDatabase.Builder] with standard settings for this project. */
         fun <T : RoomDatabase> RoomDatabase.Builder<T>.configureCommon(): RoomDatabase.Builder<T> =
-            this.fallbackToDestructiveMigration(dropAllTables = false).setQueryCoroutineContext(ioDispatcher)
+            this.fallbackToDestructiveMigration(dropAllTables = false)
+                .setMultipleConnectionPool(maxNumOfReaders = 4, maxNumOfWriters = 1)
+                .setQueryCoroutineContext(ioDispatcher)
     }
 }