v5.3

Corrected the fallback passive Perception calculation to 10 + Wisdom modifier per 5e RAW (no longer over-adding proficiency for non-proficient creatures), made exhaustion handling FGC/FGU-aware to avoid double-counting under the 2024 ruleset, and hardened several edge cases (nil-safe stealth summary, boolean conversion, and consistent unidentified-name handling for the source actor).