Add Electric and TanStack DB planning board on Postgres

[sdairs]

Fieldwork is a shared planning board using Electric, TanStack DB, Hono and Drizzle with ClickHouse Managed Postgres. Electric supplies scoped task/project collections; a reactive join and local filters drive the UI. Authoritative revision-checked writes return their transaction ID, and the UI distinguishes a committed task from a stream still catching up.

Includes pinned dependencies, separate migration/app/replication roles, a manual publication, an explicit fixed-shape proxy, a README with clickhousectl setup/cleanup, a genuine local workflow screenshot and scoped CI. Electric 1.8.1 was built from its pinned official release source because anonymous pulls from the documented image repository were unavailable; the README reproduces that build.

Validation:

• Native frozen install, typecheck, unit/integration checks and build passed.
• Actual Managed Postgres 18.6: verified TLS and wrong CA/hostname rejection in both connectors; snapshot/CDC across two browser tabs; local join/filter and real invalid project rejection; eight competing revisions with one winner; a committed create while Electric was stopped; actual app/engine restart with all nine recorded tasks matching in a fresh browser.
• Owned publication/slot removed and disposable Cloud service deleted, with absence verified.

Companion article remains local for editorial review.