Fix segment condition evaluation for falsy trait values

[emyller]

Segment conditions with comparison operators (e.g., >=, <=, ==) return incorrect results when trait values are 0, false, or empty strings. Conditions like user_age >= 0 evaluate to false when user_age is 0.

Acceptance criteria

• Update flagsmith-flag-engine dependency from 6.0.0 to 6.0.1 or later

Warning

Root cause: flagsmith-flag-engine 6.0.0 skips operator evaluation when trait values are falsy. Fix available in flagsmith-flag-engine 6.0.1+.

Fix: Flagsmith/flagsmith-engine#236
Release: https://github.com/Flagsmith/flagsmith-engine/releases/tag/v6.0.1
Reference: https://github.com/Flagsmith/edge-api/pull/436