fix(db): add missing MS21 user auth fields migration

deactivated_at, is_local_auth, password_hash, invited_by,
invitation_token, and invited_at were added to schema.prisma
but never captured in a migration, causing P2022 errors on
any fresh database deployment.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/api/prisma/migrations/20260303000001_ms21_user_auth_fields/migration.sql

@@ -0,0 +1,13 @@
+-- MS21: Add admin, local auth, and invitation fields to users table
+-- These columns were added to schema.prisma but never captured in a migration.
+
+ALTER TABLE "users"
+  ADD COLUMN IF NOT EXISTS "deactivated_at" TIMESTAMPTZ,
+  ADD COLUMN IF NOT EXISTS "is_local_auth" BOOLEAN NOT NULL DEFAULT false,
+  ADD COLUMN IF NOT EXISTS "password_hash" TEXT,
+  ADD COLUMN IF NOT EXISTS "invited_by" UUID,
+  ADD COLUMN IF NOT EXISTS "invitation_token" TEXT,
+  ADD COLUMN IF NOT EXISTS "invited_at" TIMESTAMPTZ;
+
+-- CreateIndex
+CREATE UNIQUE INDEX IF NOT EXISTS "users_invitation_token_key" ON "users"("invitation_token");