Recurring surveys no longer re-show from stale flag cache

1.406.2

Patch Changes

• #4206 a3112d9 Thanks @posthog! - fix(surveys): stop recurring surveys re-showing off a stale internal targeting flag

  Recurring surveys could re-display and record a duplicate response when the eligibility check ran against a cached internal targeting flag before fresh flags had loaded. The display loop now waits for feature flags to actually load before trusting the internal targeting flag, and forces a flag reload after a survey is completed so the flag recomputes promptly. (2026-07-21)