Restore private _handle attrs on Context and Kernel for downstream compat

Adds _handle properties that delegate to .handle on Context and Kernel,
preserving backward compatibility for downstream projects (e.g., numba-cuda)
that relied on the private attribute.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: Andy-Jost

cuda_core/cuda/core/_context.pyx

@@ -39,6 +39,10 @@ cdef class Context:
             return None
         return as_py(self._h_context)
 
+    @property
+    def _handle(self):
+        return self.handle
+
     def __eq__(self, other):
         if not isinstance(other, Context):
             return NotImplemented

cuda_core/cuda/core/_module.pyx

@@ -561,6 +561,10 @@ cdef class Kernel:
         """
         return as_py(self._h_kernel)
 
+    @property
+    def _handle(self):
+        return self.handle
+
     @staticmethod
     def from_handle(handle, mod: ObjectCode = None) -> Kernel:
         """Creates a new :obj:`Kernel` object from a foreign kernel handle.

cuda_core/docs/nv-versions.json

@@ -3,6 +3,10 @@
         "version": "latest",
         "url": "https://nvidia.github.io/cuda-python/cuda-core/latest/"
     },
+    {
+        "version": "0.6.0",
+        "url": "https://nvidia.github.io/cuda-python/cuda-core/0.6.0/"
+    },
     {
         "version": "0.5.1",
         "url": "https://nvidia.github.io/cuda-python/cuda-core/0.5.1/"