PoC: Node-integration SQLite tests via better-sqlite3

[sosek108]

Details

Adds Node-side integration tests for SQLiteProvider so the SQLite storage path is covered in CI on every PR, instead of relying on manual device runs to catch SQL-shaped regressions. Until now, the provider had no real test coverage: unit tests stub out the database, and bugs in query strings, parameter binding, merge semantics, or escaping only surfaced once the code hit a real engine on device — late, expensive, and easy to miss. Running the actual provider against a real SQL engine in Node closes that gap at zero infrastructure cost: failures show up in seconds on the same CI that already runs the rest of the suite, refactors to the SQL layer become safe to make, and the contract between SQLiteProvider and the underlying database (merge behavior, null handling, injection safety, batch semantics) is now pinned down by executable tests rather than tribal knowledge.

Related Issues

GH_LINK

Linked E/App PR

Automated Tests

Manual Tests

Author Checklist

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Screenshots/Videos

Android: Native

Android: mWeb Chrome

iOS: Native

iOS: mWeb Safari

MacOS: Chrome / Safari

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Add missing better-sqlite3 typings

When npm run typecheck runs, tsconfig.json includes the new test/mock files, but better-sqlite3 does not ship a declaration file in v12.10.0 and this PR does not add @types/better-sqlite3 to the lockfile. As a result this import fails TypeScript before the new SQLite tests can run, so the dev dependency needs matching typings (and the import should use the type shape exposed by those typings).

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