Add a parameter in SQLDatabase to support adding database comments in the info.

[physi-cs]

Checked

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• I've clearly described the feature request and motivation for it

Feature request

add parameter for function get_table_info( ), to support query info with db comment

Motivation

DB comments may help optimize prompts in some scenarios

Proposal (If applicable)

No response

[liugddx]

LGTM. Let me take a look