* improvement(tests): migrate knowledge, billing/org, and workflows/background suites off private @sim/db factories
* improvement(tests): db-mock migration tranche 1 — knowledge, billing/org, workflows/background
- migrate 19 suites off private vi.mock('@sim/db') factories onto the shared
dbChainMock + queueTableRows API (net ~-1,260 lines of bespoke chain
plumbing); resolves the known shared-worker rival pairs (knowledge
processing-queue vs api utils; billing polluters; persistence/utils vs
schedules/deploy)
- add .for() to the mock's limit builder (drizzle .limit(1).for('update'))
with a contract test
- document the join-table queue fallback footgun on queueTableRows