Module migrations 

Schema migration runner for mempill-sqlite.

Applies versioned DDL to a rusqlite Connection in a deterministic, idempotent manner. Schema version is tracked via SQLite’s built-in user_version PRAGMA.

Intended PRAGMA environment (applied at connection open in connection.rs)

• PRAGMA journal_mode=WAL; — write-ahead log for concurrent reads during writes
• PRAGMA synchronous=FULL; — full durability (mandatory; WAL+NORMAL can lose writes on power loss)
• PRAGMA foreign_keys=ON; — enforce FK constraints defined in DDL

Enums

MigrationError

Migration error wrapper.

Constants

CURRENT_SCHEMA_VERSION

The target schema version this runner brings the database to. Increment this constant (and add a new migration step) for every future DDL change.

Functions

apply_migrations

Apply all pending migrations to conn up to CURRENT_SCHEMA_VERSION.