refactor(schema): remove deprecated space and space_member tables and associated logic

309-- 2026-10-30: KenOAuth becomes the only authority for organizations,

310-- membership and permissions. The old local mirrors are retired:

311-- * presentation-only fields move to space_extras

312-- * invited_at rows move to space_member_extras

313-- * `spaces` and `space_members` are dropped, together with every FK that

314-- pointed at `spaces` (local rows keep space_id as a plain UUID).

315-- Idempotent: the block is skipped once `spaces` no longer exists.

316-- ---------------------------------------------------------------------------

317DO $$

318DECLARE

319 fk record;

320BEGIN

321 IF to_regclass('spaces') IS NOT NULL THEN

322 IF to_regclass('space_extras') IS NOT NULL THEN

323 INSERT INTO space_extras (

324 space_id, avatar_url, invite_sort_url_hash,

325 banner_url, banner_width, banner_height,

326 invite_banner_url, invite_banner_width, invite_banner_height,

327 embed_splash_url, embed_splash_width, embed_splash_height,

328 welcome_object, created_at, updated_at

329 )

330 SELECT

331 id, avatar_url, invite_sort_url_hash,

332 banner_url, banner_width, banner_height,

333 invite_banner_url, invite_banner_width, invite_banner_height,

334 embed_splash_url, embed_splash_width, embed_splash_height,

335 welcome_object, created_at, updated_at

336 FROM spaces

337 ON CONFLICT (space_id) DO NOTHING;

338 END IF;

340 IF to_regclass('space_member_extras') IS NOT NULL

341 AND to_regclass('space_members') IS NOT NULL THEN

342 INSERT INTO space_member_extras (space_id, user_id, invited_at, created_at, updated_at)

343 SELECT space_id, user_id, invited_at, created_at, COALESCE(updated_at, created_at)

344 FROM space_members

345 ON CONFLICT (space_id, user_id) DO NOTHING;

346 END IF;

348 FOR fk IN

349 SELECT conrelid::regclass AS table_name, conname

350 FROM pg_constraint

351 WHERE contype = 'f' AND confrelid = 'spaces'::regclass

352 LOOP

353 EXECUTE format('ALTER TABLE %s DROP CONSTRAINT %I', fk.table_name, fk.conname);

354 END LOOP;

356 DROP TABLE IF EXISTS space_members CASCADE;

357 DROP TABLE IF EXISTS spaces CASCADE;

358 END IF;

359END $$;

361-- ---------------------------------------------------------------------------