Playerbot: honour blacklisted turn-ins when the bot is already at the ender

The wedge-remediation blacklists a turn-in the bot can't path to, and the
picker then skips it — but that also strands a bot that HAS reached the NPC:
it stands next to the quest giver with a complete quest, current_quest_id=0
([picker_none]), and never turns in (so the chain stalls). If the bot is
within ~40y of the resolved ender, the turn-in is trivially reachable — let
the picker select it despite the blacklist.

src/modules/PlayerbotV2/Bot/BotSnapshotBuilder.cpp

@@ -4820,8 +4820,20 @@ std::shared_ptr<BotSnapshot const> BotSnapshotBuilder::Build(Player* p, BotAI* b
                 // NPC — so the picker swaps to a reachable quest instead of
                 // re-choosing the unreachable breadcrumb forever. obj_id 0 is the
                 // whole-quest sentinel the remediation stamps for turn-in goals.
+                // EXCEPTION: if the bot is already standing at the ender, the
+                // turn-in is trivially reachable — the blacklist exists to avoid
+                // re-picking an UNREACHABLE goal, so don't let it strand a wedged
+                // bot that finally made it to the NPC (observed: bots parked next
+                // to the turn-in with [picker_none] doing nothing).
                 if (bot_ai && bot_ai->objective_blacklisted(q.quest_id, 0u, now_ms))
-                    continue;
+                {
+                    if (!q.ender_resolved) continue;
+                    const float edx = q.ender_x - p->GetPositionX();
+                    const float edy = q.ender_y - p->GetPositionY();
+                    constexpr float kAtEnderSq = 40.0f * 40.0f;
+                    if (edx * edx + edy * edy > kAtEnderSq)
+                        continue;
+                }
                 // A same-map turn-in is the best possible breadcrumb; once
                 // we have one, stop looking. Otherwise keep the first any-map
                 // candidate (FIFO) but keep scanning for a same-map upgrade.