[SGLang-Diffusion] Fix fake impl eps default for torch.compile tracing

Add default value `eps=1e-5` to `register_fake` implementations of
`fused_norm_scale_shift` and `fused_scale_residual_norm_scale_shift`
custom ops, matching the default in the actual custom_op signatures.

Made-with: Cursor

python/sglang/jit_kernel/diffusion/cutedsl/scale_residual_norm_scale_shift.py

@@ -341,7 +341,7 @@ def fused_norm_scale_shift(
 
 
 @fused_norm_scale_shift.register_fake
-def _fused_norm_scale_shift_fake(x, weight, bias, scale, shift, norm_type, eps):
+def _fused_norm_scale_shift_fake(x, weight, bias, scale, shift, norm_type, eps=1e-5):
     y = x.new_empty(x.shape)
     return y
 
@@ -424,7 +424,7 @@ def fused_scale_residual_norm_scale_shift(
 
 @fused_scale_residual_norm_scale_shift.register_fake
 def _fused_scale_residual_norm_scale_shift_fake(
-    residual, x, gate, weight, bias, scale, shift, norm_type, eps
+    residual, x, gate, weight, bias, scale, shift, norm_type, eps=1e-5
 ):
     y = x.new_empty(x.shape)
     residual_out = x.new_empty(x.shape)