v3.1 - working pipeline: ollama sdk, djvu ocr, fix year/category types

Update .gitignore: exclude backup files and .env

v3.0: Major refactoring - simplified pipeline with ISBN lookup

config: remove doc/rtf/docx/chm/txt from BOOK_EXTENSIONS — manual review required

feat: two-pass pipeline, junk metadata filter, fast classification

docs: pipeline decisions and rationale

docs: add README and .env.example

fix: validate category against CATEGORIES before file move

docs: add CHANGELOG and version headers to Dicius prompts

docs: add version headers to Dicius prompts

feat: initial project structure and hardware docs

create Задача о прокрастинации и подсчете рабочего времени от Selectel

create Задача о палиндроме от Selecteт

create Dir1/File1

update Test

create Тестовоезадание

create Test