Langchain::Tool::Database#describe_table with COMMENT

[Bahanix]

Allows LLM to make use of columns' comments.
Possible since Sequel 5.87.0 (PR).

Example of usage:

Given this structure:

CREATE TABLE users(
  id integer PRIMARY KEY,
  name string COMMENT 'Internally known as 'foobar''
);

I can know ask things like Give me the last registered user's foobar to the LLM.

[andreibondarev]

@Bahanix Thank you for the PR. Pretty sure you need to update the version in the gemspec file as well.

[Bahanix]

@andreibondarev the problem was in the Gemfile.lock, this commit should fix the build 🤞