[TASK-9] Submit baseline and TF-IDF

[konodyuk]

Tasks:

• [ ] baseline:
  • [ ] implement the following dvc stages:
    • [x] data downloading
    • [x] data reading
    • [ ] constant prediction
    • [ ] prediction postprocessing, submission formatting
• [ ] tf-idf:
  • [ ] implement the following dvc stages:
    • [ ] all of the aforementioned
    • [x] training set train/val split
    • [x] tfidf featurizer
    • [x] simple model trainer
• [ ] common:
  • [ ] register on competition platform
  • [ ] submit predictions

Blocking tasks:

• [x] setup S3 storage

[github-actions[bot]]

Branch TASK-9 created!