[feat]: Make logfile download filename correspond to the log's service name

[gStart9]

Prerequisites

• I have searched for existing issues that already suggest this feature.

Describe the Feature Request

Currently pressing the Download button on a Log in the web interface presents you with a download where the default filename offered is logs.html

I suggest we change this to reflect at least the service name of where the log came from, eg. bitcoin-core_logs.html or oslogs_logs.html

It may be even better for support purposes, if people have multiple embassies on their network, to also include the Embassy's name, eg. embassy-lavish-warts_bitcoin-core_logs.html

Describe the Use Case

When a user goes to look at a log file it might be good to describe where it came from.

Describe Preferred Solution

My vote is for embassyname_servicename_logs.html

Describe Alternatives

No response

Anything else?

No response