fix: 修复TypeScript配置错误并更新项目文档

详细说明:
- 修复了@n8n/config包的TypeScript配置错误
- 移除了不存在的jest-expect-message类型引用
- 清理了所有TypeScript构建缓存
- 更新了可行性分析文档，添加了技术实施方案
- 更新了Agent prompt文档
- 添加了会展策划工作流文档
- 包含了n8n-chinese-translation子项目
- 添加了exhibition-demo展示系统框架

n8n-n8n-1.109.2/packages/@n8n/backend-test-utils/src/test-db 2.ts

@@ -0,0 +1,86 @@
+import { GlobalConfig } from '@n8n/config';
+import type { entities } from '@n8n/db';
+import { DbConnection, DbConnectionOptions } from '@n8n/db';
+import { Container } from '@n8n/di';
+import type { DataSourceOptions } from '@n8n/typeorm';
+import { DataSource as Connection } from '@n8n/typeorm';
+import { randomString } from 'n8n-workflow';
+
+export const testDbPrefix = 'n8n_test_';
+
+/**
+ * Generate options for a bootstrap DB connection, to create and drop test databases.
+ */
+export const getBootstrapDBOptions = (dbType: 'postgresdb' | 'mysqldb'): DataSourceOptions => {
+	const globalConfig = Container.get(GlobalConfig);
+	const type = dbType === 'postgresdb' ? 'postgres' : 'mysql';
+	return {
+		type,
+		...Container.get(DbConnectionOptions).getOverrides(dbType),
+		database: type,
+		entityPrefix: globalConfig.database.tablePrefix,
+		schema: dbType === 'postgresdb' ? globalConfig.database.postgresdb.schema : undefined,
+	};
+};
+
+/**
+ * Initialize one test DB per suite run, with bootstrap connection if needed.
+ */
+export async function init() {
+	const globalConfig = Container.get(GlobalConfig);
+	const dbType = globalConfig.database.type;
+	const testDbName = `${testDbPrefix}${randomString(6, 10).toLowerCase()}_${Date.now()}`;
+
+	if (dbType === 'postgresdb') {
+		const bootstrapPostgres = await new Connection(
+			getBootstrapDBOptions('postgresdb'),
+		).initialize();
+		await bootstrapPostgres.query(`CREATE DATABASE ${testDbName}`);
+		await bootstrapPostgres.destroy();
+
+		globalConfig.database.postgresdb.database = testDbName;
+	} else if (dbType === 'mysqldb' || dbType === 'mariadb') {
+		const bootstrapMysql = await new Connection(getBootstrapDBOptions('mysqldb')).initialize();
+		await bootstrapMysql.query(`CREATE DATABASE ${testDbName} DEFAULT CHARACTER SET utf8mb4`);
+		await bootstrapMysql.destroy();
+
+		globalConfig.database.mysqldb.database = testDbName;
+	}
+
+	const dbConnection = Container.get(DbConnection);
+	await dbConnection.init();
+	await dbConnection.migrate();
+}
+
+export function isReady() {
+	const { connectionState } = Container.get(DbConnection);
+	return connectionState.connected && connectionState.migrated;
+}
+
+/**
+ * Drop test DB, closing bootstrap connection if existing.
+ */
+export async function terminate() {
+	const dbConnection = Container.get(DbConnection);
+	await dbConnection.close();
+	dbConnection.connectionState.connected = false;
+}
+
+type EntityName =
+	| keyof typeof entities
+	| 'InsightsRaw'
+	| 'InsightsByPeriod'
+	| 'InsightsMetadata'
+	| 'DataStore'
+	| 'DataStoreColumn';
+
+/**
+ * Truncate specific DB tables in a test DB.
+ */
+export async function truncate(entities: EntityName[]) {
+	const connection = Container.get(Connection);
+
+	for (const name of entities) {
+		await connection.getRepository(name).delete({});
+	}
+}