Question 2 is the useful one. Knowing whether the error came from your code, a library, the platform or the database decides where you look next, and models are good at that split when you ask for it explicitly.
Here is a log line from production. Do not change code.
[paste the full line, including timestamp, request id and stack]
1. Translate it into one plain sentence.
2. Say which layer produced it: my code, a library, the platform, or the database.
3. Name the file and function I should open first.
4. Tell me which other log lines around it would confirm or rule out your reading.
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