[RELEASE ONLY CHANGES] Supply the FLA graph flag during export

PyTorch 2.15 wrap_triton export requires the cumulative-sum USE_GRAPH argument explicitly instead of relying on the eager Triton default.

Authored with Codex assistance.

Author: JacobSzwejbka

backends/cuda/triton/kernels/chunk_gated_delta_rule.py

@@ -128,6 +128,7 @@ def chunk_gated_delta_rule(
         REVERSE=False,
         HAS_SCALE=True,
         IS_VARLEN=False,
+        USE_GRAPH=False,
     )
 
     # 2. chunk_scaled_dot_kkt: compute beta * K * K^T with gating