The previous commit capped the 1.4x at 95% of context, but the multiplier
itself is unnecessary and confusing:
85% threshold × 1.4 = 119% of context → never fires
95% warn × 1.4 = 133% of context → never warns
The 85% hygiene threshold already provides ample headroom over the agent's
own 50% compressor. Even if rough estimates overestimate by 50%, hygiene
would fire at ~57% actual usage — safe and harmless.
Remove the multiplier entirely. Both actual and estimated token paths
now use the same 85% / 95% thresholds. Update tests and comments.
b799bca7a3