ddns: store configuation in database (#435)

* ddns: store configuation in database

Co-authored-by: nap0o <144927971+nap0o@users.noreply.github.com>

* feat: split domain with soa lookup

* switch to libdns interface

* ddns: add unit test

* ddns: skip TestSplitDomainSOA on ci

network is not steady

* fix error handling

* fix error handling

---------

Co-authored-by: nap0o <144927971+nap0o@users.noreply.github.com>

.github/workflows/test.yml

@@ -29,7 +29,7 @@ jobs:
         
       - uses: actions/setup-go@v5
         with:
-          go-version: "1.21.x"
+          go-version: "1.23.x"
           
       - name: Unit test
         run: |