fix: Database.from_settings/from_tenant can error out

[edgurgel]

What kind of change does this PR introduce?

Fix the case when Realtime.Database.from_settings (and `from_tenant) can't check the type of ip address and errors out.

** (MatchError) no match of right hand side value: {:error, :nxdomain}
    (realtime 2.88.2) lib/realtime/database.ex:68: Realtime.Database.from_settings/3
    (realtime 2.88.2) lib/extensions/postgres_cdc_rls/replication_poller.ex:63: Extensions.PostgresCdcRls.ReplicationPoller.handle_continue/2
    (stdlib 6.2.1) gen_server.erl:2335: :gen_server.try_handle_continue/3
    (stdlib 6.2.1) gen_server.erl:2244: :gen_server.loop/7
    (stdlib 6.2.1) proc_lib.erl:329: :proc_lib.init_p_do_apply/3
Last message: {:continue, {:connect, %Realtime.Api.Tenant{...}}}

[coveralls]

Coverage is 91.712% — fix/database-from-settings-error-REAL-787 into main. No base build found for main.

[realtime-release-bot]

🎉 This PR is included in version 2.89.2 🎉

The release is available on GitHub release

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