Auto generate vectorstore collection on application startup

[gregogalante]

During installation, I had problems as I expected the collection in the vectorstore to be created automatically.

I would like to propose inserting the auto-generation of the vectorstore in an after_initialize.

Is this a valid solution in your opinion? I can do a PR if you think it is a good solution.

Below is a Proof of Concept of the solution:

module MyRailsApplication
  class Application < Rails::Application
    # ....
    # Run vectorsearch initialization after application is loaded.
    config.after_initialize do
      provider = LangchainrbRails.config.vectorsearch
      default_schema = provider.get_default_schema
      provider.create_default_schema if !default_schema ||  default_schema.dig('status') != 'ok'
    end
  end
end

[andreibondarev]

@gregogalante I think it would be a good idea to implement this :)