fix(saas): industry template audit fixes + pgvector optional + relay timeout

- Fix seed template tools to match actual runtime tool names
  (file_read/file_write/shell_exec/web_fetch)
- Persist system_prompt/temperature/max_tokens via identity system
  in agentStore.createFromTemplate()
- Fire-and-forget assignTemplate() in AgentOnboardingWizard
- Fix saas-relay-client unused variable warning
- Make pgvector extension optional in knowledge_base migration
- Increase StreamBridge timeout from 30s to 90s for thinking models

crates/zclaw-saas/src/db.rs

@@ -577,7 +577,7 @@ async fn seed_demo_data(pool: &PgPool) -> SaasResult<()> {
         ("demo-agent-coder", "Code Assistant", "A helpful coding assistant that can write, review, and debug code",
          "coding", "gpt-4o",
          "You are an expert coding assistant. Help users write clean, efficient code.",
-         "[\"code_search\",\"code_edit\",\"terminal\"]", "[\"code_generation\",\"code_review\",\"debugging\"]",
+         "[\"file_read\",\"file_write\",\"shell_exec\"]", "[\"code_generation\",\"code_review\",\"debugging\"]",
          0.3, 8192,
          "你是一位资深全栈工程师，擅长代码编写、评审和调试。你追求简洁高效的代码风格，注重可读性和可维护性。",
          "[\"代码编写\",\"代码审查\",\"Bug调试\",\"架构设计\"]",
@@ -587,7 +587,7 @@ async fn seed_demo_data(pool: &PgPool) -> SaasResult<()> {
         ("demo-agent-writer", "Content Writer", "Creative writing and content generation agent",
          "creative", "claude-sonnet-4-20250514",
          "You are a skilled content writer. Create engaging, well-structured content.",
-         "[\"web_search\",\"document_edit\"]", "[\"writing\",\"editing\",\"summarization\"]",
+         "[\"web_fetch\",\"file_write\"]", "[\"writing\",\"editing\",\"summarization\"]",
          0.7, 4096,
          "你是一位创意写作专家，擅长各类文案创作、内容编辑和摘要生成。你善于把握文字的节奏和情感表达。",
          "[\"文章写作\",\"文案创作\",\"内容编辑\",\"摘要生成\"]",
@@ -597,7 +597,7 @@ async fn seed_demo_data(pool: &PgPool) -> SaasResult<()> {
         ("demo-agent-analyst", "Data Analyst", "Data analysis and visualization specialist",
          "analytics", "gpt-4o",
          "You are a data analysis expert. Help users analyze data and create visualizations.",
-         "[\"code_execution\",\"data_access\"]", "[\"data_analysis\",\"visualization\",\"statistics\"]",
+         "[\"shell_exec\",\"file_read\"]", "[\"data_analysis\",\"visualization\",\"statistics\"]",
          0.2, 8192,
          "你是一位数据分析专家，擅长统计分析、数据可视化和洞察提取。你善于从数据中发现有价值的模式和趋势。",
          "[\"数据分析\",\"可视化报表\",\"统计建模\",\"趋势预测\"]",
@@ -607,7 +607,7 @@ async fn seed_demo_data(pool: &PgPool) -> SaasResult<()> {
         ("demo-agent-researcher", "Research Agent", "Deep research and information synthesis agent",
          "research", "gemini-2.5-pro",
          "You are a research specialist. Conduct thorough research and synthesize findings.",
-         "[\"web_search\",\"document_access\"]", "[\"research\",\"synthesis\",\"citation\"]",
+         "[\"web_fetch\",\"file_read\"]", "[\"research\",\"synthesis\",\"citation\"]",
          0.4, 16384,
          "你是一位深度研究专家，擅长信息检索、文献综述和知识综合。你注重信息来源的可靠性和引用的准确性。",
          "[\"深度研究\",\"文献综述\",\"信息检索\",\"知识综合\"]",
@@ -627,7 +627,7 @@ async fn seed_demo_data(pool: &PgPool) -> SaasResult<()> {
         ("demo-agent-medical", "医疗助手", "Clinical decision support and medical literature assistant",
          "healthcare", "gpt-4o",
          "You are a medical AI assistant. Help with clinical decision support, literature retrieval, and medication reference. Always remind users that your suggestions do not replace professional medical advice.",
-         "[\"web_search\",\"document_access\"]", "[\"clinical_support\",\"literature_search\",\"diagnosis_assist\",\"medication_ref\"]",
+         "[\"web_fetch\",\"file_read\"]", "[\"clinical_support\",\"literature_search\",\"diagnosis_assist\",\"medication_ref\"]",
          0.2, 16384,
          "你是一位医疗AI助手，具备丰富的临床知识。你辅助临床决策、文献检索和用药参考。\n\n重要提示：\n- 你的建议仅供医疗专业人员参考\n- 不能替代正式的医疗诊断\n- 涉及患者安全的问题需格外谨慎\n- 始终建议用户咨询专业医生",
          "[\"临床辅助\",\"文献检索\",\"诊断建议\",\"用药参考\"]",