Disable rewrite min cache TTL for private local DNS?

### Prerequisites

- [X] I have checked the [Wiki](https://github.com/AdguardTeam/AdGuardHome/wiki) and [Discussions](https://github.com/AdguardTeam/AdGuardHome/discussions) and found no answer

- [X] I have searched other issues and found no duplicates

- [X] I want to request a feature or enhancement and not ask a question

### The problem

I installed Adguardhome on openwrt without changing Dnsmasq as default DNS and dhcp server. I just add a firewall's port forward rule to forward client's DNS query to Adguardhome. It's working flawlessly.

I use this entries to forward all local DNS queries to local Dnsmasq
```
[//]127.0.0.1:53
[/lan/]127.0.0.1:53
[/local/]127.0.0.1:53
```
And rewrite min cache TTL to 1800.
But I want all the private DNS query keep its original TTL.
Any solution?

### Proposed solution

Disable min cache TTL for private DNS if possible.

### Alternatives considered and additional information

_No response_