dart_edge_sql_core

Shared SQL JSON wire payload types for Dart Edge native crates.

The dart_edge_sql native asset and other native crates, such as dart_edge_auth, exchange SQL statements and result rows through JSON payloads. This crate owns that schema so those crates do not drift independently.

The types are not C ABI structs. They are serializable payload contracts used inside Dart Edge native libraries and callback bridges.

Included contracts:

• SQL statement, value, row, column, and result payloads
• stable SQL dialect codes and placeholder helpers
• structured SQL error payloads
• an explicit wire version constant