Fix all remaining test failures

- archive::metadata: add failed_files to test_extract_result
- archive::tests: use TempDir for validate_extraction_path test
- provider::sqlite: fix db path using CARGO_MANIFEST_DIR/../data/auth.sqlite
- ssh_server::cipher: use AES-128 key (16 bytes) in test
- ssh_server::kex_complete: set kexinit payloads in test
- ssh_server::rsync_handler: fix file list flags (use 1, not 0)
- ssh_server::sftp_handler: expect SSH_FXP_VERSION at byte 4 (after length prefix)

All 135 tests now pass

markbase-core/src/provider/sqlite.rs

@@ -97,9 +97,13 @@ mod tests {
         assert!(provider.is_err());
     }
 
+    fn get_test_db_path() -> String {
+        format!("{}/../data/auth.sqlite", std::env::var("CARGO_MANIFEST_DIR").unwrap())
+    }
+
     #[test]
     fn test_provider_get_user() {
-        let provider = SqliteProvider::new("data/auth.sqlite").unwrap();
+        let provider = SqliteProvider::new(&get_test_db_path()).unwrap();
         let user = provider.get_user("demo").unwrap();
         assert!(user.is_some());
         assert_eq!(user.unwrap().username, "demo");
@@ -107,28 +111,28 @@ mod tests {
 
     #[test]
     fn test_provider_nonexistent_user() {
-        let provider = SqliteProvider::new("data/auth.sqlite").unwrap();
+        let provider = SqliteProvider::new(&get_test_db_path()).unwrap();
         let user = provider.get_user("__nonexistent__").unwrap();
         assert!(user.is_none());
     }
 
     #[test]
     fn test_check_password_valid() {
-        let provider = SqliteProvider::new("data/auth.sqlite").unwrap();
+        let provider = SqliteProvider::new(&get_test_db_path()).unwrap();
         let valid = provider.check_password("demo", "demo123").unwrap();
         assert!(valid);
     }
 
     #[test]
     fn test_check_password_invalid() {
-        let provider = SqliteProvider::new("data/auth.sqlite").unwrap();
+        let provider = SqliteProvider::new(&get_test_db_path()).unwrap();
         let valid = provider.check_password("demo", "wrong").unwrap();
         assert!(!valid);
     }
 
     #[test]
     fn test_get_home_dir() {
-        let provider = SqliteProvider::new("data/auth.sqlite").unwrap();
+        let provider = SqliteProvider::new(&get_test_db_path()).unwrap();
         let dir = provider.get_home_dir("demo").unwrap();
         assert!(dir.is_some());
     }