Clean unused db models and columns

[isTravis]

Audited our Sequelize models against the rest of the codebase (imports, includes, queries, client code, workers, etc.) and removed everything that has zero runtime usage. These only existed in model definitions, type schemas, and old migration scripts under tools/.

Before merging, I wan to confirm with the team: does anyone know of external scripts, cron jobs, or direct DB queries that reference any of the below?

Removed tables (6)

Table	Notes
CommunityAdmins	No queries, no routes, no associations. The ensureUserIsCommunityAdmin utility is unrelated (it checks the Member model).
Merges	Legacy from pre-Release days. Only referenced in old tools/ migration scripts.
Organizations	Never queried. scopeGet.ts explicitly throws "No such thing as an organization". Community had a BelongsTo Organization association that was never included in any query.
PubManagers	Superseded by the Member model. Only referenced in old Firebase migration scripts.
PubVersions	Superseded by Releases. Pub model had a HasMany PubVersion association that was never used in any include. Only referenced in old tools/ scripts.
ThreadUsers	Most dead of all - wasn't even registered in sequelize.addModels(). Completely orphaned.

Removed columns (7)

Table	Column	Notes
Users	inactive	Never read, written, or filtered on anywhere.
Users	pubpubV3Id	v3 migration artifact.
Communities	organizationId	FK to the now-removed Organizations table. Always null.
Members	organizationId	Never set by createMember(). Client useMembers read it but it was always null — that code is also cleaned up here.
PublicPermissions	organizationId	Never set or queried.
Releases	historyKeyMissing	One-time data migration flag from 2020. Never read at runtime.
ReviewNews	labels	Whitelisted for API update but never sent by any client or read by any server code.

Other cleanup

• Removed Organization-related UI code in DashboardMembers (including two @ts-expect-error comments that acknowledged Organizations "aren't really a thing anymore")
• Removed PubVersion type export from types/pub.ts
• Cleaned up mock/storybook data that referenced removed fields