Smallfix - Revive Balance Update

Adjusted revive penalties to better match difficulty and mission progression:

Missions 1-5

• Easy: Revive penalty 0%

• Medium: Revive penalty 10%

• Hard: Revive penalty 30%

Mission 6+

• Easy: Revive penalty 10%

• Medium: Revive penalty 20%

• Hard: Restart Mission on death (no revive)

This keeps early missions more forgiving while preserving the high-stakes feel of Hard in later missions.