Hall of the fallen: kills and causes of death, in the game and over all games in the profile

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

docs/ROADMAP.md

@@ -142,3 +142,7 @@ grid), guard and attack markers (shields and swords), savegames with the game st
    language files (20 per kind, per language), a humorous epithet from level 5 and a grand one from level 8;
    names in the hover info, the creature overview and the messages. A creature of level 3+ that falls leaves a
    memorial stone on its master's ground (hover: who lies there; at most 24).
+7. **Hall of the fallen** (done, v202611-00073) - every named creature of level 3+ that falls is remembered
+   with its level, heroes slain and how it fell (slain by a kind, lava, water, snare, lightning): in the game
+   (creature overview "Fallen", or a click with the hand on a memorial stone) and over all games on the
+   achievements page (kept in the profile, at most 200, merged with the server copy).