Fix rubocop lint warnings in native_helpers.rb

- Add rubocop:disable comments for intentionally unused credentials
  parameters (kept for API consistency with other ecosystems)
- Fix Layout/FirstMethodArgumentLineBreak in JSON.generate call

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: jessealama

lean/lib/dependabot/lean/native_helpers.rb

@@ -17,7 +17,7 @@ module NativeHelpers
           credentials: T::Array[Dependabot::Credential]
         ).returns(T::Hash[String, T.untyped])
       end
-      def self.run_lake_update(directory:, credentials:)
+      def self.run_lake_update(directory:, credentials:) # rubocop:disable Lint/UnusedMethodArgument
         run_helper(
           function: "update_all",
           args: { directory: directory }
@@ -30,7 +30,7 @@ def self.run_lake_update(directory:, credentials:)
           credentials: T::Array[Dependabot::Credential]
         ).returns(T::Hash[String, T.untyped])
       end
-      def self.check_updates(directory:, credentials:)
+      def self.check_updates(directory:, credentials:) # rubocop:disable Lint/UnusedMethodArgument
         run_helper(
           function: "check_updates",
           args: { directory: directory }
@@ -61,10 +61,12 @@ class << self
           ).returns(T::Hash[String, T.untyped])
         end
         def run_helper(function:, args:)
-          stdin_data = JSON.generate({
-            function: function,
-            args: args
-          })
+          stdin_data = JSON.generate(
+            {
+              function: function,
+              args: args
+            }
+          )
 
           stdout, stderr, status = Open3.capture3(
             helper_path,