Worklog for task "Add project documentation analysis features to the AI agent"

Ha, quite a stumble over large file uploads. I mean, the issue wasn't even how to upload a large file (we would've solved that quickly), but rather that, as it turned out, we weren't handling the error itself when uploading a file exceeding the allowed limit. The upload would just hang infinitely. We finally beat it, but the number of times and ways the opus failed in the process is enough material for a good separate article. I'll publish it a bit later, because I still want the introductory word to be the first topic, but at least we've figured it out and fixed it now.