chore: upgrade flashinfer 0.3.0rc1 (#9793)

python/pyproject.toml

@@ -63,7 +63,7 @@ srt = [
     "torchaudio==2.8.0",
     "torchvision",
     "cuda-python",
-    "flashinfer_python==0.2.14.post1",
+    "flashinfer_python==0.3.0rc1",
 ]
 
 blackwell = [
@@ -73,7 +73,7 @@ blackwell = [
     "torchaudio==2.8.0",
     "torchvision",
     "cuda-python",
-    "flashinfer_python==0.2.14.post1",
+    "flashinfer_python==0.3.0rc1",
 ]
 
 # HIP (Heterogeneous-computing Interface for Portability) for AMD

python/sglang/srt/entrypoints/engine.py

@@ -672,7 +672,7 @@ def _set_envs_and_config(server_args: ServerArgs):
     if server_args.attention_backend == "flashinfer":
         assert_pkg_version(
             "flashinfer_python",
-            "0.2.14.post1",
+            "0.3.0rc1",
             "Please uninstall the old version and "
             "reinstall the latest version by following the instructions "
             "at https://docs.flashinfer.ai/installation.html.",