Issue: is:escalating filter appears to misclassify issues during short-term spikes

### Problem Statement

The `is:escalating` issue filter does not appear to align with intuitive or expected behavior during short‑term error spikes. Issues returned by this filter are often not meaningfully “escalating,” even when there is a clear spike in errors over a shorter time window.

This makes it difficult to rely on the filter for operational triage during incidents

### Solution Brainstorm

One of the following would be expected:

- `is:escalating` should correlate with a recent increase in frequency or impact over an appropriate short-term window (e.g., minutes or hours), or
- The definition of “escalating” should be clarified if it is intentionally comparing broad timeframes (e.g., week-over-week).

It appears that escalation may be determined by comparing this week vs. last week, which may be too coarse for operational use during real-time incidents. e.g. an alert reviewing the last 15 mins showed a solid bump in count for issues, but none of the issues listed in the Alert showed as "escalating", even though one clearly has an increase in count.