Harden authentication, tenant isolation and security boundaries

prisma/migrations/20261009020000_read_tenant_constraints/migration.sql

@@ -0,0 +1,20 @@
+BEGIN;
+-- AlterTable
+ALTER TABLE "announcement_reads" ADD COLUMN     "kitaId" TEXT;
+UPDATE announcement_reads AS r SET "kitaId" = a."kitaId" FROM announcements AS a WHERE a.id = r."announcementId";
+ALTER TABLE announcement_reads ALTER COLUMN "kitaId" SET NOT NULL;
+
+-- CreateIndex
+CREATE UNIQUE INDEX "announcements_id_kitaId_key" ON "announcements"("id", "kitaId");
+
+-- CreateIndex
+CREATE INDEX "announcement_reads_kitaId_idx" ON "announcement_reads"("kitaId");
+
+
+ALTER TABLE users ADD CONSTRAINT users_family_requires_tenant CHECK ("familyId" IS NULL OR "kitaId" IS NOT NULL);
+ALTER TABLE announcement_reads ADD CONSTRAINT announcement_reads_user_tenant_fkey
+  FOREIGN KEY ("userId", "kitaId") REFERENCES users(id, "kitaId") ON DELETE NO ACTION ON UPDATE NO ACTION;
+ALTER TABLE announcement_reads ADD CONSTRAINT announcement_reads_announcement_tenant_fkey
+  FOREIGN KEY ("announcementId", "kitaId") REFERENCES announcements(id, "kitaId") ON DELETE NO ACTION ON UPDATE NO ACTION;
+
+COMMIT;