fix(deepseek): restore --reasoning-config and reasoning_effort

recipes/deepseek-v4-flash/recipe.toml

@@ -29,7 +29,9 @@ args = [
     "--tool-call-parser", "deepseek_v4",
     "--enable-auto-tool-choice",
     "--reasoning-parser", "deepseek_v4",
+    "--reasoning-config", '{"reasoning_parser":"deepseek_v4","reasoning_start_str":"","reasoning_end_str":""}',
     "--default-chat-template-kwargs", '{"thinking":true,"preserve_thinking":true}',
+    "--default-chat-template-kwargs.reasoning_effort", "high",
     "--enable-flashinfer-autotune",
     "--trust-remote-code",
     "--served-model-name", "deepseek-v4-flash", "default",