fix(copy): add retry for copy operation

[dentiny]

Rationale for this change

We should wrap retry layer around copier-related operations.
Code implementation-wise, copier should mimic what we do for writer (any reason we don't do that?)

What changes are included in this PR?

Code change should be straightforward.

Are there any user-facing changes?

No

AI Usage Statement

opus 4.7 made the code change

[dentiny]

CC @Xuanwo I found we miss basically all the layering support for copier?
Apart from the two existing PRs (for retry and timeout), I plan to file a giant PR to add all missing layer support if you don't mind.

[Xuanwo]

CC @Xuanwo I found we miss basically all the layering support for copier? Apart from the two existing PRs (for retry and timeout), I plan to file a giant PR to add all missing layer support if you don't mind.

Yes, I'm open to this. They are all quite straightforward.