feat(map): remove looted object node pins on loot

When a quest object node is opened/looted, that specific node's
map/minimap pin now disappears immediately even before the objective is
fully collected, instead of all node pins staying until turn-in.

On LOOT_OPENED, QuestieQuest:RemoveLootedObjectivePins finds the active
object-objective spawn nearest the player's world position (<=12 yd),
marks it consumed in Questie.db.char.lootedObjectSpawns, and repopulates
just that objective so clustering recomputes with the node skipped.
_DetermineIconsToDraw skips consumed object spawns, so removal persists
across redraws and /reload. ClearLootedSpawns runs on AcceptQuest, so
abandoning and re-doing the quest (including after an Ascension prestige)
shows every node again.

Works in every data source mode (auto/learner/static/none): suppression
is centralized in the shared _DetermineIconsToDraw that all redraw routes
funnel through, operating on the mode-resolved objective.spawnList.
Matching is radius-based (1.5 zone units) so a learner spawn re-added at
the player's position for the just-looted node is suppressed too.
Scoped to object-type objectives; monster/kill pins are unchanged.

Modules/QuestieEventHandler.lua

@@ -181,10 +181,17 @@ function QuestieEventHandler:RegisterLateEvents()
         end)
     end
 
-    -- Questie Debug Offer
-    if Questie.IsSoD then
-        Questie:RegisterEvent("LOOT_OPENED", QuestieDebugOffer.LootWindow)
-    end
+    -- LOOT_OPENED: remove pins for looted quest object nodes, and (SoD) run the debug offer.
+    -- AceEvent allows only one handler per event on the Questie object, so both run here.
+    Questie:RegisterEvent("LOOT_OPENED", function(...)
+        local ok, err = pcall(function() QuestieQuest:RemoveLootedObjectivePins() end)
+        if not ok then
+            Questie:Debug(Questie.DEBUG_ELEVATED, "[QuestieEventHandler] RemoveLootedObjectivePins error:", err)
+        end
+        if Questie.IsSoD and QuestieDebugOffer and QuestieDebugOffer.LootWindow then
+            QuestieDebugOffer.LootWindow(...)
+        end
+    end)
 
     -- Questie Comms Events