[BUG] Username field too short

[jvinolas]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

Username field is restricted to 20 chars. Not enough for some users, for example when using a proxy gate with long user:host names:

Expected Behavior

Longer username field restriction for new monitored hosts.

Steps To Reproduce

1. docker compose
2. default config
3. add new monitored host
4. username field restricted to 20 chars

Environment

HertzBeat version(s): v1.5.0

Debug logs

No response

Anything else?

No response

[zuobiao-zhou]

I can fix it.