fix: Resolve all Rubocop warnings and ensure tests pass

- Fix Lint/ShadowingOuterLocalVariable warnings in example files
- Use 'uploaded_file' variable name to avoid shadowing
- All Rubocop checks now pass (133 files, no offenses)
- Full test suite passes (306 examples, 0 failures)

Author: vipulnsward

api_examples/upload_api/comprehensive_demo.rb

@@ -134,8 +134,8 @@ def print_error(message, error)
   files.each(&:close)
 
   print_success("Batch upload successful (#{results.length} files)")
-  results.each_with_index do |file, i|
-    puts "  File #{i + 1}: #{file.uuid} (#{file.original_filename})"
+  results.each_with_index do |uploaded_file, i|
+    puts "  File #{i + 1}: #{uploaded_file.uuid} (#{uploaded_file.original_filename})"
   end
 rescue StandardError => e
   print_error('Batch upload failed', e)

api_examples/upload_api/uploader_real_test.rb

@@ -96,8 +96,8 @@
 
   puts '   ✓ Success!'
   puts "   Uploaded #{results.length} files"
-  results.each_with_index do |file, i|
-    puts "   File #{i + 1}: #{file.uuid} (#{file.original_filename})"
+  results.each_with_index do |uploaded_file, i|
+    puts "   File #{i + 1}: #{uploaded_file.uuid} (#{uploaded_file.original_filename})"
   end
 rescue StandardError => e
   puts "   ✗ Error: #{e.message}"

mise.toml

@@ -1,2 +1,2 @@
 [tools]
-ruby = "4.0.0"
+ruby = "3.4.5"