refactor(workspace): enforce layered crate boundaries

crates/aether-data/runtime/src/error.rs

@@ -0,0 +1,32 @@
+pub use aether_data_contracts::DataLayerError;
+
+#[cfg(feature = "postgres")]
+pub(crate) fn postgres_error(error: impl std::fmt::Display) -> DataLayerError {
+    DataLayerError::postgres(error)
+}
+
+pub(crate) fn sql_error(error: impl std::fmt::Display) -> DataLayerError {
+    DataLayerError::sql(error)
+}
+
+#[cfg(feature = "postgres")]
+pub(crate) trait SqlxResultExt<T> {
+    fn map_postgres_err(self) -> Result<T, DataLayerError>;
+}
+
+#[cfg(feature = "postgres")]
+impl<T> SqlxResultExt<T> for Result<T, sqlx::Error> {
+    fn map_postgres_err(self) -> Result<T, DataLayerError> {
+        self.map_err(postgres_error)
+    }
+}
+
+pub(crate) trait SqlResultExt<T> {
+    fn map_sql_err(self) -> Result<T, DataLayerError>;
+}
+
+impl<T> SqlResultExt<T> for Result<T, sqlx::Error> {
+    fn map_sql_err(self) -> Result<T, DataLayerError> {
+        self.map_err(sql_error)
+    }
+}