Balance marker set to 4. The changes from 0.113.0 to 0.115.0 — guardians with an escort, a Core with 2.5× hull, a staggered generation shift, and a jump that works without a skill point — shift the difficulty curve substantially. Runs measured under marker 3 are measuring a different game.
Without this marker, telemetry analysis would have lumped the new runs in with the old ones and averaged together numbers from two different games — exactly the mistake the analysis tooling now filters out as of today. Nothing changes in the game itself; the number is only recorded in the telemetry profile.