J3 D8-f #1: route prod autopilot boss/elite through the turn engine

Prod autopilot resolved boss/elite fights inline via SimulateCombat, which
swings the enemy once per round (Combatant has no ID to look up the SRD
multiattack profile). Manual !fight uses the turn engine, which loops the
full profile — so autopilot players faced strictly weaker bosses than
manual. D8-e confirmed this is the gap, not a turn-engine artifact.

- Promote the sim's autoResolveCombat/simPickCombatAction to shared plugin
  methods autoDriveCombat/pickAutoCombatAction (single source of truth; the
  sim now calls the same code prod does).
- Add MessageContext.Silent + a replyDM helper; the turn-engine combat
  handlers route their DMs through it so the background autopilot can drive
  the real !fight/!attack engine without spamming a DM per round (the EoD
  digest summarizes the outcome).
- tryAutoRun now calls runAutopilotWalkDriven (inlineBossCombat flipped
  true->false): walk->fight->walk loop so one tick still covers ~autoRunRoomCap
  rooms, but boss AND elite now face the player's full kit against the
  enemy's full multiattack. Loss surfaces as stopEnded (run already
  force-extracted by finishCombatSession).

Trash mobs stay on the fast inline path. GOGOBEE_SIM_INLINE_BOSS=1 A/B
toggle preserved. Build + plugin tests green; sim smoke-run unchanged.

internal/plugin/dnd_zone_cmd.go

@@ -380,16 +380,16 @@ func roomGlyph(rt RoomType) string {
 type stopReason int
 
 const (
-	stopOK       stopReason = iota // walked to next room; loop may continue
-	stopFork                       // advanceTransitionGraph returned a forkMsg
-	stopElite                      // standing at an Elite doorway; needs !fight
-	stopBoss                       // standing at a Boss doorway; needs !fight
-	stopEnded                      // patrol or room resolution killed the player
-	stopComplete                   // run cleared (boss down, no outgoing edges)
-	stopBlocked                    // an active CombatSession blocks the advance
-	stopHarvestCombat              // auto-harvest pulled into combat that resolved short of death
-	stopPreflight                  // pre-iteration preflight tripped (low HP / low SU)
-	stopBossSafety                 // compact autopilot bailed before boss (HP/SU/exhaustion gate) — caller pitches a rest camp
+	stopOK            stopReason = iota // walked to next room; loop may continue
+	stopFork                            // advanceTransitionGraph returned a forkMsg
+	stopElite                           // standing at an Elite doorway; needs !fight
+	stopBoss                            // standing at a Boss doorway; needs !fight
+	stopEnded                           // patrol or room resolution killed the player
+	stopComplete                        // run cleared (boss down, no outgoing edges)
+	stopBlocked                         // an active CombatSession blocks the advance
+	stopHarvestCombat                   // auto-harvest pulled into combat that resolved short of death
+	stopPreflight                       // pre-iteration preflight tripped (low HP / low SU)
+	stopBossSafety                      // compact autopilot bailed before boss (HP/SU/exhaustion gate) — caller pitches a rest camp
 )
 
 // bossSafetyHPPct — compact-autopilot won't engage a boss while current HP
@@ -477,11 +477,13 @@ func (p *AdventurePlugin) advanceOnce(ctx MessageContext) (advanceResult, error)
 
 // inlineBossCombat (only consulted when compact==true) selects between the
 // two background combat paths at a boss/elite doorway. true keeps the
-// long-expedition D3 inline auto-resolve (production autorun). false
-// returns stopBoss/stopElite after the safety gate so a turn-based driver
-// — currently only the headless sim's autoResolveCombat / simPickCombatAction
-// — handles the fight via the regular !fight / !attack engine. The sim
-// uses false so simPickSpell actually fires; D8-prereq re-wired this seam.
+// legacy inline auto-resolve (SimulateCombat — fast, but ignores enemy
+// multiattack). false returns stopBoss/stopElite after the safety gate so
+// a turn-based driver — autoDriveCombat / pickAutoCombatAction — handles
+// the fight via the regular !fight / !attack engine. Both the headless sim
+// and the production autorun (long-expedition D8-f) now pass false so the
+// real engine (with multiattack) resolves the encounter and simPickSpell
+// actually fires; D8-prereq re-wired this seam, D8-f flipped prod onto it.
 func (p *AdventurePlugin) advanceOnceWithOpts(ctx MessageContext, compact, inlineBossCombat bool) (advanceResult, error) {
 	run, err := getActiveZoneRun(ctx.Sender)
 	if err != nil {
@@ -568,10 +570,10 @@ func (p *AdventurePlugin) advanceOnceWithOpts(ctx MessageContext, compact, inlin
 				}
 			}
 			if !inlineBossCombat {
-				// Background caller wants to drive the fight itself (sim's
-				// autoResolveCombat / simPickCombatAction). Surface the
-				// doorway like the foreground path does, after the safety
-				// gate has had a chance to defer the engagement.
+				// Background caller wants to drive the fight itself via the
+				// turn engine (autoDriveCombat / pickAutoCombatAction).
+				// Surface the doorway like the foreground path does, after
+				// the safety gate has had a chance to defer the engagement.
 				kind := "Elite"
 				r := stopElite
 				if prev == RoomBoss {
@@ -953,6 +955,7 @@ func (p *AdventurePlugin) resolveRoom(userID id.UserID, run *DungeonRun, zone Zo
 // resolveCombatRoom spawns one roster enemy (elite filter optional),
 // runs combat, persists side effects, fires nat-1/nat-20 mood deltas,
 // and renders the staged narration. Returns:
+//
 //   intro   — pre-combat block (TwinBee combat-start + monster stat block)
 //   phases  — RenderCombatLog output, streamed with delays by the caller
 //   outcome — post-combat block: nat20/nat1 flavor, kill line, loot, d20 summary
@@ -1139,7 +1142,7 @@ type BossOutcomeInputs struct {
 	Result               CombatResult
 	PreHP, PostHP, MaxHP int
 	PhaseTwoAt           float64 // fraction of MaxHP; 0 disables phase-two narration
-	Nat20s, Nat1s        int // pre-counted by scanMoodEventsFromCombat
+	Nat20s, Nat1s        int     // pre-counted by scanMoodEventsFromCombat
 
 	// Caller-supplied headlines so arena and zone read in their own voice.
 	// DefeatHeadline is the full sentence shown after the PlayerDeath
@@ -1287,4 +1290,3 @@ func (p *AdventurePlugin) zoneCmdAbandon(ctx MessageContext) error {
 		"🚪 Abandoned **%s** at room %d/%d. No rewards.",
 		zone.Display, run.CurrentRoom+1, run.TotalRooms))
 }
-