Release 3.8.6 (2025-08-19)

• Based on upstream Nix 2.30.2.

What's Changed

• Auto update release notes by @grahamc in DeterminateSystems/nix-src#170
• Use WAL mode for SQLite cache databases (2nd attempt) by @edolstra in DeterminateSystems/nix-src#167
• Enable parallel marking in boehm-gc by @edolstra in DeterminateSystems/nix-src#168
• BasicClientConnection::queryPathInfo(): Don't throw exception for invalid paths by @edolstra in DeterminateSystems/nix-src#172
• Fix queryPathInfo() negative caching by @edolstra in DeterminateSystems/nix-src#173
• forceDerivation(): Wait for async path write after forcing value by @edolstra in DeterminateSystems/nix-src#176

Full Changelog: v3.8.5...v3.8.6