* main: (94 commits)
  Fix shell injection via `shell=True` in subprocess calls (#23894)
  [ty] Refactor `relation.rs` to store state on a struct rather than passing around 7 arguments every time we recurse (#23837)
  Don't return code actions for non-Python documents (#23905)
  [ty] Make the default database truly statically infallible (#23929)
  [ty] Add `Download` button to ty playground which creates a zip export (#23478)
  [ty] Respect `kw_only` overwrites in dataclasses (#23930)
  [ty] Clarify in diagnostics that `from __future__ import annotations` only stringifies type annotations (#23928)
  [ty]  Add a `Copy Markdown` button to playground (#23002)
  [ty] Fix folding range classification of lines starting with `#` (#23831)
  [ty] Fix folding ranges for notebooks (#23830)
  [ty] fix too-many-cycle panics when inferring literal type loop variables (#23875)
  Add `RegularCallableTypeOf` and `into_regular_callable` in `ty_extensions` (#23909)
  [ty] treat properties as full structural types (#23925)
  [ty] Avoid duplicated work during multi-inference (#23923)
  [ty]: make `possibly-missing-attribute` ignored by default
  [ty]: split out `possibly-missing-submodule` from `possibly-missing-attribute`
  Update astral-sh/setup-uv action to v7.5.0 (#23922)
  [ty] Show truthiness in ConstraintSet display and simplify falsy error message (#23913)
  Bump 0.15.6 (#23919)
  [ty] Narrow type context during collection literal inference (#23844)
  ...