New additive flavor files (zone_goblin_warrens_flavor.go,
zone_crypt_valdris_flavor.go) with elite-room intros, boss ability
callouts (Grol: Surprise Attack / Heart of Hruggek / Terrifying Roar;
Valdris: Corrupting Touch / Legendary Resistance / Call of the Grave /
Phase Two), and zone-specific lore deep-dives. Existing
twinbee_gm_flavor.go is untouched per the protected-files contract.
Wires three narration helpers in dnd_zone_narration.go:
composeBossEntry — boss-entry render plus a one-line ability callout
eliteRoomEntryLine — elite-room atmospheric prefix
zoneLorePool — zone-specific !lore pool with generic fallback
Boss-entry callsite in dnd_zone_cmd.go now uses composeBossEntry; the
elite branch of resolveCombatRoom prefixes with the zone's elite line.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
