fix: preserve domains in nested route resolution

[elpete]

Summary

• forward the incoming domain while resolving module and namespace route tables
• preserve the domain during recursive package resolution
• return an empty nested result instead of treating a module mount point as an executable route
• correctly recognize normalized explicit /:handler/:action module routes so ColdBox does not append a duplicate convention route
• add regressions for domain-constrained module routing and convention-route registration

Verification

• RoutingServiceTest + RouterTest + ModuleSpec: 102 passed on BoxLang 1.16.0+57
• targeted cfformat check: 4 files passed
• git diff --check passed
• CommuniArts integration with cbsecurity-passkeys: supported platform/tenant hosts return 200; an unsupported host returns 404

Note: the repository-wide local format check reports the unchanged system/web/routing/Router.cfc from the base branch; the PR formatting job is green.

[github-actions]

Test Results

0 tests  ±0   0 ✅ ±0   0s ⏱️ ±0s
0 suites ±0   0 💤 ±0 
0 files   ±0   0 ❌ ±0 

Results for commit 1241706. ± Comparison against base commit 3088699.

♻️ This comment has been updated with latest results.