feat: add knowledge management functionality with CRUD operations and database schema

- Implemented KnowledgeHandler for managing knowledge groups and items, including listing, creating, updating, and deleting operations.
- Added database migration scripts to create necessary tables for knowledge management, including knowledge_groups, knowledge_items, knowledge_parse_tasks, and knowledge_chunks_meta.
- Introduced prompt_rule_knowledge_groups table to associate prompt rules with knowledge groups.

server/internal/tenant/app/template_prompt_test.go

@@ -49,7 +49,7 @@ func TestBuildGenerationPromptAddsTopXBrandPriorityRules(t *testing.T) {
 		"topic":      "合肥全屋定制",
 		"brand_name": "安徽海翔家居用品销售有限公司",
 		"locale":     "zh-CN",
-	})
+	}, "")
 
 	for _, expected := range []string{
 		"模板专项要求:",
@@ -68,7 +68,7 @@ func TestBuildGenerationPromptDoesNotAddTopXBrandRulesForOtherTemplates(t *testi
 	prompt := buildGenerationPrompt("product_review", "产品评测", nil, map[string]interface{}{
 		"product_name": "测试产品",
 		"brand_name":   "安徽海翔家居用品销售有限公司",
-	})
+	}, "")
 
 	if strings.Contains(prompt, "排在第 1 位") {
 		t.Fatalf("buildGenerationPrompt() = %q, should not include top-x ranking rules", prompt)