chore: sync model pricing from OpenRouter API

providers/moonshot.toml

@@ -66,8 +66,8 @@ display_name = "Kimi K2.5"
 tier = "frontier"
 context_window = 131072
 max_output_tokens = 16384
-input_cost_per_m = 0.3827
+input_cost_per_m = 0.0
-output_cost_per_m = 1.72
+output_cost_per_m = 0.0
 supports_tools = true
 supports_vision = true
 supports_streaming = true