Adv 2.0 D&D polish: GM→DM rename, streamed zone combat, end-to-end scenario test

GM→DM rename across docs and code (GMNarrationType→DMNarrationType,
GMState→DMState, narration constants, comments) so the system reads as
"Dungeon Master" everywhere. Player-visible "GM mood" wording stays
where it appears in flavor.

Streamed zone/expedition combat: zone advance now stages patrol →
patrol play-by-play → patrol resolution → room intro → room play-by-play
→ final outcome through sendZoneCombatMessages with 2–3s pacing
(arena keeps its 5–8s window). Combat narrative lines pick up a compact
d20-vs-AC roll annotation for hit/crit/miss/block events.

Combat outcome polish: dndHPSnapshot lets narration show sheet HP
rather than legacy combat-engine HP, and markAdventureDead clears the
zombie state where hp_current was 0 but the legacy alive flag stayed
true after a D&D-layer KO.

Adv 2.0 announcement (ADVENTURE_2.0_ANNOUNCEMENT.md), README rewrite
covering the new layer, and adv2_scenario_test.go — a full
zone-run + expedition + harvest playthrough against a copy of the prod
DB asserting persisted state end-to-end.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

internal/plugin/dnd_setup.go

@@ -632,7 +632,7 @@ func renderSetupComplete(c *DnDCharacter) string {
 			"  HP %d/%d   AC %d\n"+
 			"  STR %d  DEX %d  CON %d  INT %d  WIS %d  CHA %d\n\n"+
 			"_%s_\n\n"+
-			"Use `!sheet` anytime to review. Combat, abilities, and rest mechanics arrive in the next phases.",
+			"Use `!sheet` anytime to review. `!zone list` to head out, or `!expedition list` for a longer run.",
 		c.Level, ri.Display, ci.Display,
 		c.HPCurrent, c.HPMax, c.ArmorClass,
 		c.STR, c.DEX, c.CON, c.INT, c.WIS, c.CHA,