* feat: linux support custom data dir via environment variable
* feat(keychain): support custom log directory via LARKSUITE_CLI_LOG_DIR
* feat(security): validate env dir paths for security
Add validation for environment variable directory paths to ensure they are absolute and safe. This prevents potential security issues from malformed paths. Also add corresponding tests to verify the validation behavior.
* docs(validate): add function and test documentation comments
Add missing documentation comments for SafeEnvDirPath function and related test cases to improve code clarity and maintainability
* refactor(keychain): remove warning logs for invalid env vars
