debug(minimap): add /qdrift slash command and throttled PIN debug for drift diagnosis

- /qdrift: one-shot diagnostic that traces the full player-position chain
  (GetCurrentPlayerPosition -> GetWorldCoordinatesFromZone), checks
  mapIdToUiMapId entries, shows pin world coords vs player world coords,
  and verifies zone center bounds
- Throttled [QD] PIN debug in drawMinimapPin (1/sec) showing pinWorld,
  playerWorld, distance, mapRadius, and diff values
- Enhanced [QD] CONV/CONV2 debug in GetCurrentPlayerPosition showing
  raw coords, world coords after conversion, and zone coords after
  back-conversion

Purpose: diagnose why minimap pins follow the player after the areaId fix

Compat/HBD.lua

@@ -424,6 +424,17 @@ local lastZoom, lastFacing, lastXY, lastYY
 local function drawMinimapPin(pin, data)
     local xDist, yDist = lastXY - data.x, lastYY - data.y
 
+    -- Throttled debug: print once per second max
+        if _G.QuestieDebugPins and data.uiMapID and (not _G._QDPinDebugTime or (GetTime() - _G._QDPinDebugTime) > 1) then
+            _G._QDPinDebugTime = GetTime()
+            print(string.format(
+                "[QD] PIN uiMap=%s pinW=(%.2f,%.2f) playerW=(%.2f,%.2f) dist=(%.2f,%.2f) mapRad=%.1f diff=(%.4f,%.4f)",
+                tostring(data.uiMapID),
+                data.x, data.y, lastXY, lastYY,
+                xDist, yDist, mapRadius or -1,
+                xDist / (mapRadius or 1), yDist / (mapRadius or 1)))
+        end
+
     -- handle rotation
     if rotateMinimap then
         local dx, dy = xDist, yDist