[BugFix] Fix AttributeError in eagle speculative decoding when bs != len(sampling_info)

[lingebeng]

Motivation

When I read the sglang's source code about speculative, I found something belows:

sglang/python/sglang/srt/speculative/eagle_info.py

Line 2 in 977830e

from copy import copy

sglang/python/sglang/srt/speculative/eagle_info.py

Lines 273 to 278 in 977830e

	if bs != len(sampling_info):
	sampling_info = copy.deepcopy(sampling_info)
	# NOTE: retrieve_index are the indices of the requests that are kept.
	sampling_info.filter_batch(
	self.retrieve_index.tolist(), self.retrieve_index
	)

from copy import copy shadowed the copy module, causing copy.deepcopy() to raise AttributeError. Changed to import copy to fix.

AttributeError: 'function' object has no attribute 'deepcopy'

Modifications

Only change from copy import copy to import copy, and I have found that no other copy in this file.
So the change is safe.

cc @Ying1123 @merrymercy @hnyls2002 @Qiaolin-Yu

[gemini-code-assist]

Code Review

This pull request updates the import statement in eagle_info.py from from copy import copy to import copy to prevent shadowing the copy module. I have no further feedback to provide.