Refresh IANA top level domain list and add rake update_tlds

[devin-ai-integration]

Summary

PublicDomainSuffix#initialize rejects a domain whose last label is absent from the bundled tlds-alpha-by-domain.txt (raise ArgumentError, 'has invalid tld') before public_suffix ever sees it, so a stale snapshot silently turns real brand gTLD domains into ExceptionalValue. The snapshot was missing MERCK and WEB, so msd.merck was exceptional even though public_suffix's PSL knows the tld. Downstream this breaks contact-to-company auto-linking and search indexing in nexl360 (see NEXL-LTS/nexl360#17696).

The refresh merges rather than replaces: IANA has retired 51 tlds still present in our snapshot (ABARTH, CBS, VOLKSWAGEN, …), and dropping them would make already-stored historical domains newly exceptional. rake update_tlds encodes that union rule so future refreshes are one command.

A new spec asserts the snapshot is a superset of every single-label rule in public_suffix's PSL; onion is the sole expected exception, since it is a special-use name that IANA does not publish.

Checklist

• Changelog updated
• Version bumped in rails_values.gemspec

Test plan

bundle exec rspec (259 examples, 0 failures) and bundle exec rubocop (no offenses). rake update_tlds re-run against live IANA data reports added nothing, confirming the file is current. Verified before/after: PublicDomainSuffix.cast('msd.merck') was ExceptionalValue, now parses with tld merck; global.weir and bmwgroup.bmw are covered by the new brand-gTLD spec.

Link to Devin session: https://app.devin.ai/sessions/d71cadb95122427f80ec21aafa2c8c9a
Requested by: @natelindsey-nexl

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[devin-ai-integration]

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.

[Copilot]

🟡 Changes recommended

The update task can write an error response into the checked-in TLD list.

Get a fresh assessment by requesting another Copilot review.

Pull request overview

Refreshes the bundled IANA TLD snapshot and adds automated maintenance and coverage for brand gTLDs.

Changes:

• Adds MERCK and WEB TLDs.
• Adds rake update_tlds with union-based merging.
• Adds PSL coverage specs.
• Bumps version to 2.0.10 and updates the changelog.

File summaries

File	Description
spec/rails_values/public_domain_suffix_spec.rb	Adds TLD coverage tests.
Rakefile	Adds the TLD refresh task.
rails_values.gemspec	Bumps the gem version.
lib/rails_values/tlds-alpha-by-domain.txt	Adds missing TLD entries.
CHANGELOG.md	Documents the release.

The Rakefile task should reject unsuccessful IANA responses before parsing or overwriting the snapshot.

Review details

• Files reviewed: 5/5 changed files
• Comments generated: 1
• Review effort level: Lite

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[natelindsey-nexl]

VA is a country code, not the country name expected by Country.is?, so initialization raises an exception. This causes all 13 specs to fail during file loading, producing 0 examples, 13 errors.

Change the record to the supported country name:

Diff
{

• "country": "VA",

• "country": "Vatican City",
  "tld": ".va"
  }
  The resulting entry should be:

JSON
{
"country": "Vatican City",
"tld": ".va"
}