v4.0.0

Added

• ask_brightdata_assistant: ask Sophie, Bright Data's support
  assistant, about products, zones, errors or setup. Pass the returned
  dialog_id to ask a follow-up. On by default and in every group, as
  on the hosted server.

Changed

• Playwright is pinned to 1.64.1, the same version as the hosted server.

Removed

• BREAKING: The discover tool and its Discover API integration.
  It was in every tool group and on by default, so it is no longer
  served in any config. Use search_engine or search_engine_batch to
  find sources and scrape_as_markdown or scrape_batch to read them.
• POLLING_TIMEOUT. The AI insights tools wait up to 600 seconds, as
  before. Configs that set it keep working; it is ignored.