fix(saas): migration idempotency fixes + SCHEMA_VERSION bump to 14

- Add IF NOT EXISTS to accounts_template_assignment ALTER COLUMN
- Add IF NOT EXISTS to webhooks CREATE INDEX statements
- Add created_at/updated_at columns + ON CONFLICT DO NOTHING to industry templates
- Bump SCHEMA_VERSION 13→14 to force migration re-run on existing DB

crates/zclaw-saas/migrations/20260405000001_industry_agent_templates.sql

@@ -10,7 +10,8 @@ INSERT INTO agent_templates (
     model, system_prompt, tools, capabilities, temperature, max_tokens,
     visibility, status, current_version,
     soul_content, scenarios, welcome_message, quick_commands,
-    personality, communication_style, source_id, version
+    personality, communication_style, source_id, version,
+    created_at, updated_at
 ) VALUES (
     'edu-teacher-001',
     '教学助手',
@@ -55,8 +56,9 @@ INSERT INTO agent_templates (
     'friendly',
     '温暖、耐心、善于用易懂的语言解释复杂概念',
     'education-teacher',
-    1
-);
+    1,
+    NOW(), NOW()
+) ON CONFLICT (id) DO NOTHING;
 
 -- ============================================================
 -- 2. Healthcare — 医疗行政助手
@@ -66,7 +68,8 @@ INSERT INTO agent_templates (
     model, system_prompt, tools, capabilities, temperature, max_tokens,
     visibility, status, current_version,
     soul_content, scenarios, welcome_message, quick_commands,
-    personality, communication_style, source_id, version
+    personality, communication_style, source_id, version,
+    created_at, updated_at
 ) VALUES (
     'healthcare-admin-001',
     '医疗行政助手',
@@ -111,8 +114,9 @@ INSERT INTO agent_templates (
     'professional',
     '专业、准确、注重细节，提供技术深度和可操作建议',
     'healthcare-admin',
-    1
-);
+    1,
+    NOW(), NOW()
+) ON CONFLICT (id) DO NOTHING;
 
 -- ============================================================
 -- 3. Design (Shantou) — 设计助手
@@ -122,7 +126,8 @@ INSERT INTO agent_templates (
     model, system_prompt, tools, capabilities, temperature, max_tokens,
     visibility, status, current_version,
     soul_content, scenarios, welcome_message, quick_commands,
-    personality, communication_style, source_id, version
+    personality, communication_style, source_id, version,
+    created_at, updated_at
 ) VALUES (
     'design-shantou-001',
     '设计助手',
@@ -167,5 +172,6 @@ INSERT INTO agent_templates (
     'creative',
     '富有创意、思维开放，鼓励探索新想法和解决方案',
     'design-shantou',
-    1
-);
+    1,
+    NOW(), NOW()
+) ON CONFLICT (id) DO NOTHING;