fix(cli): retry transient sync probe failures

Signed-off-by: Taylor Mutch <taylormutch@gmail.com>

Author: TaylorMutch

crates/openshell-cli/src/ssh.rs

@@ -1072,9 +1072,13 @@ fn sync_error_is_retryable(err: &Report) -> bool {
         "early eof",
         "http2",
         "h2 protocol",
+        "reset before headers",
+        "service is currently unavailable",
         "transport error",
         "unexpected eof",
         "unavailable",
+        "upstream connect error",
+        "ssh probe exited with status exit status: 255",
         "ssh tar create exited",
         "ssh tar extract exited",
         "failed to extract tar archive from sandbox",
@@ -1590,6 +1594,16 @@ mod tests {
         assert!(sync_error_is_retryable(&err));
     }
 
+    #[test]
+    fn sync_error_retry_filter_accepts_transient_ssh_probe_failures() {
+        let err = Err::<(), _>(miette::miette!(
+            "ssh probe exited with status exit status: 255"
+        ))
+        .wrap_err("failed to resolve sandbox source path '/sandbox/ha-sync/ha-sync-upload'")
+        .unwrap_err();
+        assert!(sync_error_is_retryable(&err));
+    }
+
     #[test]
     fn sync_error_retry_filter_rejects_validation_failures() {
         let err = miette::miette!("sandbox source path '/etc/passwd' resolves outside /sandbox");