Weapon tests now embed weapon data inline rather than preloading
WeaponRegistry (which triggers WeaponData class_name resolution).
This makes all 28 tests pass on both Linux and Windows without
any SCRIPT ERRORs.
Also add WeaponData.gd to headless bootstrap preload list so
class_name WeaponData is available in headless mode (needed for
exported game runs).
Test breakdown (all pass, zero errors):
weapons.gd: 9 tests (6 weapons + registration + default pistol)
bootstrapper.gd: 6 tests (input parsing validation)
team.gd: 6 tests (auto-assign, team names, enum values)
economy.gd: 7 tests (constants, money clamping, loss streaks)
shawn
ba2fc37502