* commit '6e0fb055d18969eb923e719ad92ecac3a5c5d534': (42 commits)
  chore: bump version to 0.15.1 (langgenius#12690)
  feat: add table of contents to Knowledge API doc (langgenius#12688)
  [fix] support feature restore (langgenius#12563)
  api tool support multiple env url (langgenius#12249)
  Add new integration with Opik Tracking tool (langgenius#11501)
  fix: add type hints for App model and improve error handling in audio services (langgenius#12677)
  fix: Update variable handling in VariableAssignerNode and clean up app_dsl_service (langgenius#12672)
  Revert "Feat/new saas billing" (langgenius#12673)
  fix(workflow): fix answer node stream processing in conditional branches (langgenius#12510)
  fix: ruff with statements (langgenius#12578)
  fix: ruff check for True if ... else (langgenius#12576)
  chore: Adjust translations to align with Taiwanese Mandarin conventions (langgenius#12633)
  Fix pandas indexing method for knowledge base imports (langgenius#12637) (langgenius#12638)
  Feat/new saas billing (langgenius#12591)
  improve the readability of the function generate_api_key (langgenius#12552)
  chore: translate i18n files (langgenius#12543)
  Feat/add knowledge include all filter (langgenius#12537)
  fix: Add datasets list access control and fix datasets config display issue (langgenius#12533)
  fix: sum costs return error value on overview page (langgenius#12534)
  feat: show workflow running status (langgenius#12531)
  ...

# Conflicts:
#	api/poetry.lock