[mergify]

b8c335a (#7876) changed every DNS lookup to Resolver.resolve. That method exists only in dnspython 2, and production still runs 1.x. The broad except in check_dns_cname and check_dns_a hides the AttributeError, so every custom domain check fails. TLS renewals of custom domains fail too.

This changes the calls back to query. It works on 1.x and 2.x (on 2.x it only gives a deprecation warning). The new test patches the real Resolver class, because a mock has every attribute and would hide a missing method. I reverted one call to resolve and the test failed.

Tested locally on dnspython 1.16.0, with real DNS lookups in bench console:

Check	Result
Resolver.resolve (before)	AttributeError: 'Resolver' object has no attribute 'resolve'
check_dns_cname("github.com", "www.github.com")	Matched: www.github.com. IN CNAME github.com.
check_dns_a("github.com", "github.com")	Matched: github.com. IN A 20.207.73.82
check_dns_a("frappe.io", "frappe.io")	"Multiple A records" error, which is correct (two Cloudflare IPs). The SOA lookup for the DNS provider hint also worked.
get_mx_ip("gmail.com")	Returned the 5 Gmail MX hosts

press.utils.test_dns passes (4 tests). Not run: selfhosted.py, the audit script, and the CAA and AAAA checks. They have the same one-word change.

Custom domains whose TLS renewal failed after the deploy need a retry after this merges.

🤖 Generated with Claude Code

https://claude.ai/code/session_01VhJqVgj53KVnJy9MFACx9m

---

This is an automatic backport of pull request #7898 done by [Mergify](https://mergify.com).

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🎉 This PR is included in version 0.169.12 🎉

The release is available on GitHub release

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[codecov-commenter]

Codecov Report

❌ Patch coverage is 63.15789% with 7 lines in your changes missing coverage. Please review.
✅ Project coverage is 65.15%. Comparing base (db4fbc1) to head (cb7651d).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
press/utils/dns.py	16.66%	5 Missing ⚠️
press/api/selfhosted.py	0.00%	1 Missing ⚠️
press/utils/email_validator.py	0.00%	1 Missing ⚠️

❌ Your patch status has failed because the patch coverage (63.15%) is below the target coverage (75.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #7899      +/-   ##
==========================================
+ Coverage   65.14%   65.15%   +0.01%     
==========================================
  Files        1114     1114              
  Lines      110339   110348       +9     
  Branches     2094     2094              
==========================================
+ Hits        71876    71897      +21     
+ Misses      38407    38395      -12     
  Partials       56       56              

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