Module pragmas 

SQLite pragma helpers applied on every connection. SQLite PRAGMA helpers applied at connection open and on each transaction.

Functions

apply_connection_pragmas

Applies per-connection PRAGMAs: synchronous, foreign keys, busy timeout, cache, mmap, WAL.

apply_init_pragmas

Applies one-time PRAGMAs on a freshly opened connection (e.g. auto_vacuum).

ensure_wal_mode

Re-asserts PRAGMA journal_mode = WAL after operations that may revert it (notably refinery-driven migrations, which can open internal handles that reset the journal mode in some scenarios). Idempotent and cheap; emits tracing::warn! if WAL fails to engage so degraded behaviour is observable.