refactor(workspace): enforce layered crate boundaries

crates/aether-data/runtime/src/lifecycle/backfill/sqlite.rs

@@ -0,0 +1,16 @@
+use sqlx::migrate::MigrateError;
+use tracing::info;
+
+use super::types::PendingBackfillInfo;
+use crate::driver::sqlite::SqlitePool;
+
+pub async fn run_backfills(_pool: &SqlitePool) -> Result<(), MigrateError> {
+    info!("sqlite database backfills are up to date");
+    Ok(())
+}
+
+pub async fn pending_backfills(
+    _pool: &SqlitePool,
+) -> Result<Vec<PendingBackfillInfo>, MigrateError> {
+    Ok(Vec::new())
+}