perf(device): pop retired deletions off the front in O(ready) (#116)

ReclaimDeletions ran an O(n) walk + survivor compaction over the whole
deletion queue every frame. frameCounter is monotonic, so retireAfter is
non-decreasing down the queue and the entries ready to reclaim are always
a contiguous prefix. Switch deletionQueue from std::vector to std::deque
and pop the ready prefix off the front, stopping at the first entry still
in flight — O(ready) instead of O(queue).

Resolves #116

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

interfaces/Crafter.Graphics-Device.cppm

@@ -320,7 +320,11 @@ export namespace Crafter {
         // Zero until set, which only makes ReclaimDeletions more eager — and it
         // is never called before a Window (which sets this) starts rendering.
         inline static std::uint8_t framesInFlight = 0;
-        inline static std::vector<PendingDeletion> deletionQueue;
+        // A deque, not a vector: frameCounter is monotonic, so retireAfter is
+        // non-decreasing down the queue and the entries ready to reclaim are
+        // always a prefix. ReclaimDeletions pops that prefix off the front in
+        // O(ready) instead of walking and compacting the whole queue.
+        inline static std::deque<PendingDeletion> deletionQueue;
         // Tag {buffer, memory} for deletion after framesInFlight more frames.
         // A VK_NULL_HANDLE buffer is ignored (nothing to free).
         static void EnqueueDeletion(VkBuffer buffer, VkDeviceMemory memory);