refactor: 移除健康检查模块及相关测试，简化代码结构

Author: yinxulai

source/adapters/secret/env.test.ts

@@ -10,7 +10,6 @@ export * from './interfaces.js'
 
 // Core implementations
 export { YamlConfigScanner, createConfigScanner } from './scanner.js'
-export { EnvSecretResolver, createEnvSecretResolver } from '@adapters/secret/env'
 export { PostgreSQLDriver, createPostgreSQLDriver } from '@adapters/database/postgresql'
 export { S3StorageDriver, createS3StorageDriver } from '@adapters/storage/s3'
 export { DefaultBackupExecutor, createBackupExecutor } from './executor.js'

source/adapters/secret/env.ts

@@ -1,7 +1,6 @@
 
 import type { Readable, Writable } from 'node:stream'
 import type {
-  SecretRef,
   BackupConfig,
   BackupResult,
   DumpOptions,
@@ -15,15 +14,6 @@ import type {
 // Re-export BackupError so implementations can use it
 export { BackupExecutionError as BackupError } from './executor.js'
 
-export interface SecretResolver {
-  /**
-   * 解析密钥引用
-   * @param ref 密钥引用
-   * @returns 实际密钥值
-   */
-  resolve(ref: SecretRef): Promise<string>
-}
-
 export interface DatabaseDriver {
   /** 数据库类型 */
   readonly type: string

source/core/index.ts

@@ -84,16 +84,6 @@ export interface LocalConfig {
   path: string
 }
 
-/**
- * 密钥引用
- */
-export interface SecretRef {
-  /** 可选类型标记，仅保留 env */
-  type?: 'env'
-  /** 环境变量名 */
-  envVar?: string
-}
-
 /**
  * 调度配置
  */

source/core/interfaces.ts

@@ -5,4 +5,3 @@
 
 export * from './core/index.js'
 export * from './retention/index.js'
-export * from './health/index.js'