fix(cli): Add validation for search-mode parameter

Author: mayani-nv

python/cuvs_bench/cuvs_bench/run/__main__.py

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2024, NVIDIA CORPORATION.
+# Copyright (c) 2024-2025, NVIDIA CORPORATION.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -112,6 +112,7 @@
 @click.option(
     "-m",
     "--search-mode",
+    type=click.Choice(["latency", "throughput"], case_sensitive=False),
     default="latency",
     show_default=True,
     prompt='Enter the search mode ("latency" or "throughput")',
@@ -135,7 +136,7 @@
     "--dry-run",
     is_flag=True,
     help="Dry-run mode will convert the yaml config for the specified "
-    "algorithms and datasets to the json format that’s consumed "
+    "algorithms and datasets to the json format that's consumed "
     "by the lower-level c++ binaries and then print the command to "
     "run execute the benchmarks but will not actually execute "
     "the command.",