nous

Random programming certificates are generally worthless. The course to get them might teach you a lot and be worth while, but the certificate at the end is worthless. If it is free then it does not matter too much either way, might be a good way to test yourself. But I would not rely on it to get you a job at all. For that you need other ways to prove you can do the job - typically with the ability to talk about stuff and having written some real world like application. Which a course might help you do to.

The indicator being stuck is a recently fixed issue:

Fixed a case where the battery level indicator could become stuck

https://store.steampowered.com/news/app/1675200?emclan=103582791470414830&emgid=529850584204838038

YAML is not a good format for this. But any line based or steamable format would be good enough for log data like this. Really easy to parse with any language or even directly with shell scripts. No need to even know SQL, any text processing would work fine.

CSV would be fine. The big problem with the data as presented is it is a YAML list, so needs the whole file to be read into memory and decoded before you get and values out of it. Any line based encoding would be vastly better and allow line based processing to be done. CSV, json objects encoded into a single line, some other streaming binary format. Does not make much difference overall as long as it is line based or at least streamable.

Never said it had to be a text file. There are many binary serialization formats that could be used. But is a lot of situations the overhead you save is not worth the debugging effort of working with binary data. For something like this that is likely not going to be more then a GB or so, probably much less it really does not matter that much if you use binary or text formats. This is an export format that will likely just have one batch processing layer on. This type of thing is generally easiest for more people to work with in a plain text format. If you really need efficient querying of the data then it is trivial and quick to load it into a DB of your choice rather then being stuck with sqlite.

export tracking data to analyze later on

That is essentially log data or essentially equivalent. Log data does not have to be human readable, it is just a series of events that happen over time. Most log data, even what you would think of as traditional messages from a program, is not parsed by humans manually but analyzed by code later on. It is really not that hard to slow to process log data line by line. I have done this with TB of data before which does require a lot more effort to do. A simple file like this would take seconds to process at most, even if you were not very efficient about it. I also never said it needed to be stored as text, just a simple file is enough - no need for a full database. That file could be binary if you really need it to be but text serialization would also be good enough. Most of the web world is processed via text serialization.

The biggest problem with yaml like in OP is the need to decode the whole file at once since it is a single list. Line by line processing would be a lot easier to work with. But even then if it is only a few 100 MBs loading it all in memory once and analyzing it all in memory would not take long at all - it just does not scale very well.

What is wrong with a file for this? Sounds more like a local log or debug output that a single thread in a single process would be creating. A file is fine for high volume append only data like this. The only big issue is the format of that data.

What benefit would a database bring here?

Only 40%? Would have thought it would be much higher. Don't more projects generally fail then that without being in a bubble?

The attack is known as the evil maid attack. It requires repeated access to the device. Basically if you can compromise the bootloader you can inject a keylogger to sniff out the encryption key the next time someone unlocks the device. This is what secure boot is meant to help protect against (though I believe that has also been compromised as well).

But realistically very few people need to worry about that type of attack. Encryption is good enough for most people. And if you don't have your system encrypted then it does not matter what bootloader you use as anyone can boot any live usb to read your data.

I don't agree go is simpler to read. It is simpler to learn the syntax but the syntax is only part of what makes a language. Having learnt both, and having spent more time actually writing go I still prefer writing rust and finding it far easier to work with then go. Go has too many hidden gotchas that you need to trip up on to learn and then remember forever or else trip up on them again.

On their readme

Harper currently only supports English, but the core is extensible to support other languages, so we welcome contributions that allow for other language support.

Well, that is the first option they suggest:

Option 1: Give Linux Mint a try