De-risks the flagship. The app is synchronous (better-sqlite3) but Kysely
executes async, so db/kysely.cts uses Kysely as a TYPE-SAFE BUILDER only:
build the query (columns + user_id/deleted_at scoping + types checked at
compile time), `.compile()`, then run via sync helpers (all/get/run) on the
shared connection. No async ripple, no change to the sync model.
- Schema typed for `categories` (extend as adopted).
- tests/kyselyPoc.test.js proves byte-identical rows vs the raw SQL and
that compiled SQL is parameterized (injection-safe).
- Pattern documented in CODE_STANDARDS; adopt for new/refactored queries;
it type-enforces user-scoping (the biggest data-isolation win) and
removes Row=any at the call site.
typecheck:server + check:server clean; 248/248 server tests.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
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