Make Coveralls conditional to prevent firewall blocks in restricted CI environments

[Copilot]

GitHub Actions in restricted network environments cannot reach coveralls.io. The test suite unconditionally loads Coveralls on every run, causing connection attempts that hit firewall blocks.

Changes

• Modified spec/spec_helper.rb: Guard Coveralls initialization with environment checks

# Before: Always attempts connection
require 'coveralls'
Coveralls.wear!

# After: Only connects when explicitly configured
if ENV['CI'] && ENV['COVERALLS_REPO_TOKEN']
  require 'coveralls'
  Coveralls.wear!
end

Behavior

• Tests run without coverage reporting by default (no network connection)
• Coverage reporting activates when COVERALLS_REPO_TOKEN secret is configured
• CI environment variable already set by GitHub Actions

Enabling Coverage (Optional)

Add COVERALLS_REPO_TOKEN repository secret with Coveralls API token. No workflow changes required.

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[Copilot]

Pull request overview

This pull request modifies the test suite to make Coveralls code coverage reporting conditional based on environment variables, preventing firewall connection issues in restricted CI environments.

Changes:

• Guard Coveralls initialization with ENV['CI'] && ENV['COVERALLS_REPO_TOKEN'] check to prevent unconditional connection attempts to coveralls.io