[Auto Sync] Update activation.py, chunk_cache.py, utils.py (20250917) (#10538)

Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

python/sglang/srt/mem_cache/chunk_cache.py

@@ -28,6 +28,13 @@ class ChunkCache(BasePrefixCache):
         self.token_to_kv_pool_allocator = token_to_kv_pool_allocator
         self.page_size = page_size
 
+    # NOTE (csy): this is to determine if a cache has prefix matching feature.
+    # Chunk cache always return True to indicate no prefix matching.
+    # TODO (csy): Using a prefix cache trait to replace this
+    @property
+    def disable(self):
+        return True
+
     def reset(self):
         pass
 
@@ -38,7 +45,7 @@ class ChunkCache(BasePrefixCache):
             last_host_node=None,
         )
 
-    def cache_finished_req(self, req: Req):
+    def cache_finished_req(self, req: Req, insert: bool = True):
         kv_indices = self.req_to_token_pool.req_to_token[
             req.req_pool_idx,
             # For decode server: if req.output_ids is empty, we want to free all req.origin_input_ids