When a docker compose service has multiple comma-separated domains, the
generate() method was only processing the first domain and truncating the rest.
The issue was that Url::fromString() can't parse comma-separated URLs - it only
parses the first one.
Fixed by:
1. Splitting comma-separated domains with explode(',', $domain_string)
2. Processing each domain individually in a foreach loop
3. Generating preview URLs for each domain using the same template/random/pr_id
4. Joining the results back with implode(',', $preview_fqdns)
This ensures all domains get properly transformed for preview deployments.
Example:
- Original: http://domain1.com,http://domain2.com
- Preview: http://57.domain1.com,http://57.domain2.com
- Before fix: http://57.domain1.com,http (truncated)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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