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/migrations/20260402000002_knowledge_base.sql

@@ -1,9 +1,9 @@
--- Migration: Knowledge Base tables with pgvector support
+-- Migration: Knowledge Base tables with optional pgvector support
 -- 5 tables: knowledge_categories, knowledge_items, knowledge_chunks,
 --           knowledge_versions, knowledge_usage
-
--- Enable pgvector extension
-CREATE EXTENSION IF NOT EXISTS vector;
+--
+-- pgvector is optional: if the extension is not installed, the embedding
+-- column and HNSW index are skipped. All other tables work normally.
 
 -- 行业分类树
 CREATE TABLE IF NOT EXISTS knowledge_categories (
@@ -42,12 +42,12 @@ CREATE INDEX IF NOT EXISTS idx_ki_status_updated ON knowledge_items(status, upda
 CREATE INDEX IF NOT EXISTS idx_ki_keywords ON knowledge_items USING GIN(keywords);
 
 -- 知识分块（RAG 检索核心）
+-- 基础表不含 embedding 列；若 pgvector 可用则后续通过 DO 块添加
 CREATE TABLE IF NOT EXISTS knowledge_chunks (
     id TEXT PRIMARY KEY,
     item_id TEXT NOT NULL REFERENCES knowledge_items(id) ON DELETE CASCADE,
     chunk_index INT NOT NULL,
     content TEXT NOT NULL,
-    embedding vector(1536),
     keywords TEXT[] DEFAULT '{}',
     created_at TIMESTAMPTZ DEFAULT NOW()
 );
@@ -55,11 +55,25 @@ CREATE UNIQUE INDEX IF NOT EXISTS idx_kchunks_item_idx ON knowledge_chunks(item_
 CREATE INDEX IF NOT EXISTS idx_kchunks_item ON knowledge_chunks(item_id);
 CREATE INDEX IF NOT EXISTS idx_kchunks_keywords ON knowledge_chunks USING GIN(keywords);
 
--- 向量相似度索引（HNSW，无需预填充数据）
--- 仅在有数据后创建此索引可提升性能，这里预创建
-CREATE INDEX IF NOT EXISTS idx_kchunks_embedding ON knowledge_chunks
-    USING hnsw (embedding vector_cosine_ops)
-    WITH (m = 16, ef_construction = 128);
+-- 条件添加 embedding 列和 HNSW 索引（仅当 pgvector 可用时）
+DO $$ BEGIN
+    PERFORM set_config('client_min_messages', 'warning', true);
+    CREATE EXTENSION IF NOT EXISTS vector;
+    IF NOT EXISTS (
+        SELECT 1 FROM information_schema.columns
+        WHERE table_name = 'knowledge_chunks' AND column_name = 'embedding'
+    ) THEN
+        ALTER TABLE knowledge_chunks ADD COLUMN embedding vector(1536);
+    END IF;
+    IF NOT EXISTS (SELECT 1 FROM pg_indexes WHERE indexname = 'idx_kchunks_embedding') THEN
+        CREATE INDEX idx_kchunks_embedding ON knowledge_chunks
+            USING hnsw (embedding vector_cosine_ops)
+            WITH (m = 16, ef_construction = 128);
+    END IF;
+    RAISE NOTICE 'pgvector enabled for knowledge base';
+EXCEPTION WHEN OTHERS THEN
+    RAISE NOTICE 'pgvector not available, vector features disabled: %', SQLERRM;
+END $$;
 
 -- 版本快照
 CREATE TABLE IF NOT EXISTS knowledge_versions (
@@ -89,7 +103,6 @@ CREATE TABLE IF NOT EXISTS knowledge_usage (
     created_at TIMESTAMPTZ DEFAULT NOW()
 );
 CREATE INDEX IF NOT EXISTS idx_ku_item ON knowledge_usage(item_id) WHERE item_id IS NOT NULL;
--- BRIN 索引：追加写入的时间序列数据比 B-tree 更高效
 CREATE INDEX IF NOT EXISTS idx_ku_created_brin ON knowledge_usage USING brin(created_at);
 
 -- 权限种子数据（使用 jsonb 操作避免 REPLACE 脆弱性）