Close expedition/run seam on combat loss & flee

Run-loss paths (turn-based elite/boss death + flee, exploration combat
death/retreat, interrupt/patrol death) abandoned the zone run but left
the wrapping expedition row at status='active', so the ambient ticker
kept DMing about a dungeon the player had walked away from.

Adds forceExtractExpeditionForRunLoss helper and wires it into every
run-loss site; ambient ticker also skips when the expedition's run is
no longer active as a safety net.

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

internal/plugin/combat_cmd.go

@@ -267,6 +267,7 @@ func (p *AdventurePlugin) finishCombatSession(userID id.UserID, sess *CombatSess
 			_, _ = applyMoodEvent(sess.RunID, MoodEventPlayerDeath)
 		}
 		_ = abandonZoneRun(userID)
+		forceExtractExpeditionForRunLoss(userID, "combat death")
 		markAdventureDead(userID, "zone", zone.Display)
 		if line := twinBeeLine(zone.ID, DMPlayerDeath, sess.RunID, cadence); line != "" {
 			b.WriteString(line + "\n")
@@ -278,6 +279,7 @@ func (p *AdventurePlugin) finishCombatSession(userID id.UserID, sess *CombatSess
 		// but no death timer. Chosen candidate from the migration plan's
 		// open question on flee outcome.
 		_ = abandonZoneRun(userID)
+		forceExtractExpeditionForRunLoss(userID, "combat flee")
 		b.WriteString(fmt.Sprintf("🏃 You broke off from **%s** and slipped away. Run ended — you keep your wounds, but you live.", enemy.Name))
 
 	default: