fix: add missing columns to tenant schema template (runbook.updated_at, contact.role)

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

packages/shared/database/src/migrations/002-create-tenant-schema-template.sql

@@ -80,7 +80,8 @@ CREATE TABLE runbooks (
     max_risk_level  SMALLINT NOT NULL DEFAULT 1,
     auto_approve    BOOLEAN NOT NULL DEFAULT FALSE,
     is_active       BOOLEAN NOT NULL DEFAULT TRUE,
-    created_at      TIMESTAMPTZ NOT NULL DEFAULT NOW()
+    created_at      TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at      TIMESTAMPTZ NOT NULL DEFAULT NOW()
 );
 
 -- Standing Orders
@@ -230,6 +231,7 @@ CREATE TABLE contacts (
     telegram_id     VARCHAR(100),
     wechat_id       VARCHAR(100),
     preferred_channel VARCHAR(20) NOT NULL DEFAULT 'websocket',
+    role            VARCHAR(50),
     is_active       BOOLEAN NOT NULL DEFAULT TRUE
 );