feat(JobScheduler): improve dependency handling logic

Updated `JobScheduler` to enhance dependency tracking by counting valid dependencies upfront and dynamically adjusting counts using `Interlocked` operations. Improved job enqueueing logic to ensure jobs are only enqueued when all dependencies are met.

Replaced `Interlocked.Increment` with `Interlocked.Add` for batch updates to `_totalJobCount`, improving performance. Adjusted `VirtualStack` cleanup to use the correct size variable for memory deallocation.

Simplified `JobDispatchingJob` API by removing `ctx.ThreadIndex` parameter. Updated `TestJobSystem` to pass job handles as dependencies for proper execution order.

Incremented assembly version to 1.5.9 to reflect these changes.

Misaki.HighPerformance.LowLevel/Buffer/VirtualStack.cs

@@ -216,12 +216,13 @@ public unsafe struct VirtualStack : IMemoryAllocator<VirtualStack, VirtualStack.
         }
 
         var ptr = _baseAddress;
+        var size = _reserveCapacity;
 
         _baseAddress = null;
         _allocatedOffset = 0;
         _committedSize = 0;
         _reserveCapacity = 0;
 
-        Munmap(ptr, _reserveCapacity);
+        Munmap(ptr, size);
     }
 }