Fix Style/ItAssignment cop

[tagliala]

The response_handler method in lib/hawk/http.rb previously used the variable name it to store request information for error messages.

Ruby 3.4 introduces a new special variable it for single-line blocks. Using it as a local variable can now cause confusion or unexpected behavior, especially as Ruby evolves. The new RuboCop Style/ItAssignment cop enforces this best practice.

This commit renames the local variable it for clarity and future compatibility. No functional changes.

Additionally, use interpolation instead of array join for performance

Comparison (IPS):
       interpolation:  6610794.3 i/s
                join:  6103137.6 i/s - 1.08x  (± 0.00) slower

Comparison (Memory):
       interpolation:         80 allocated
                join:        120 allocated - 1.50x more

See: https://www.ruby-lang.org/en/news/2024/12/25/ruby-3-4-0-released/

[Copilot]

Pull Request Overview

This PR modernizes variable naming and improves performance in the HTTP response handler to comply with Ruby 3.4 standards. The change addresses a RuboCop Style/ItAssignment cop violation by renaming a local variable that conflicts with Ruby 3.4's new special it variable.

Key changes:

• Renamed local variable it to req_info for Ruby 3.4 compatibility
• Replaced array join with string interpolation for better performance
• Updated all error message references to use the new variable name

Comments suppressed due to low confidence (1)

lib/hawk/http.rb:128

• [nitpick] The variable name req_info is somewhat generic. Consider a more descriptive name like request_description or request_summary to better convey that it represents a formatted string for error messages.

      req_info = "#{meth} #{url}"