What this PR does / why we need it?

Add support for AWS Route 53 as a DNS provider, enabling automatic DNS-01 validation via ACME.
Close #10562

Summary of your change

• Added AWSRoute53 DNS type in backend and integrated lego’s Route53 provider.

• Updated go.mod/go.sum with AWS SDK dependencies.

• Updated frontend UI and i18n to support the new DNS provider option.

  Testing
  Route 53 DNS-01 flow has been fully validated:

  2025/12/02 17:36:03 开始申请证书，域名 [demo.gotocam.app] 申请方式 [DNS 自动] DNS 账号 [aws] 厂商 [AWSRoute53]
  2025/12/02 17:36:03 [INFO] [demo.gotocam.app] acme: Obtaining bundled SAN certificate
  2025/12/02 17:36:04 [INFO] [demo.gotocam.app] AuthURL: https://acme-v02.api.letsencrypt.org/acme/authz/xxxx/xxxx
  2025/12/02 17:36:04 [INFO] [demo.gotocam.app] acme: Could not find solver for: tls-alpn-01
  2025/12/02 17:36:04 [INFO] [demo.gotocam.app] acme: Could not find solver for: http-01
  2025/12/02 17:36:04 [INFO] [demo.gotocam.app] acme: use dns-01 solver
  2025/12/02 17:36:04 [INFO] [demo.gotocam.app] acme: Preparing to solve DNS-01
  2025/12/02 17:36:30 [INFO] [demo.gotocam.app] acme: Trying to solve DNS-01
  2025/12/02 17:36:30 [INFO] [demo.gotocam.app] acme: Checking DNS record propagation. [nameservers=10.255.255.254:53]
  2025/12/02 17:36:40 [INFO] Wait for propagation [timeout: 30m0s, interval: 10s]
  2025/12/02 17:36:51 [INFO] [demo.gotocam.app] The server validated our request
  2025/12/02 17:36:51 [INFO] [demo.gotocam.app] acme: Cleaning DNS-01 challenge
  2025/12/02 17:37:15 [INFO] [demo.gotocam.app] acme: Validations succeeded; requesting certificates
  2025/12/02 17:37:16 [INFO] [demo.gotocam.app] Server responded with a certificate.
  2025/12/02 17:37:16 申请 [demo.gotocam.app] 证书成功！！
  

  

Please indicate you've done the following:

• Made sure tests are passing and test coverage is added if needed.
• Made sure commit message follow the rule of Conventional Commits specification.
• Considered the docs impact and opened a new docs issue or PR with docs changes if needed.