ci: add coverage and ruff (#1383)

* add coverage calculation and push

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* new codecov version and usage of token

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* enable ruff formatter instead of black and isort

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* apply ruff lint fixes

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* apply ruff unsafe fixes

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* add removed imports

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* runs 1 on linter issues

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* finalize linter fixes

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>

* Update pyproject.toml

Co-authored-by: Cesar Berrospi Ramis <75900930+ceberam@users.noreply.github.com>
Signed-off-by: Michele Dolfi <97102151+dolfim-ibm@users.noreply.github.com>

---------

Signed-off-by: Michele Dolfi <dol@zurich.ibm.com>
Signed-off-by: Michele Dolfi <97102151+dolfim-ibm@users.noreply.github.com>
Co-authored-by: Cesar Berrospi Ramis <75900930+ceberam@users.noreply.github.com>

tests/test_e2e_conversion.py

@@ -1,7 +1,6 @@
 from pathlib import Path
 
 from docling.backend.docling_parse_backend import DoclingParseDocumentBackend
-from docling.backend.docling_parse_v4_backend import DoclingParseV4DocumentBackend
 from docling.datamodel.base_models import InputFormat
 from docling.datamodel.document import ConversionResult
 from docling.datamodel.pipeline_options import AcceleratorDevice, PdfPipelineOptions
@@ -15,7 +14,6 @@ GENERATE_V2 = GEN_TEST_DATA
 
 
 def get_pdf_paths():
-
     # Define the directory you want to search
     directory = Path("./tests/data/pdf/")
 
@@ -25,7 +23,6 @@ def get_pdf_paths():
 
 
 def get_converter():
-
     pipeline_options = PdfPipelineOptions()
     pipeline_options.do_ocr = False
     pipeline_options.do_table_structure = True
@@ -45,7 +42,6 @@ def get_converter():
 
 
 def test_e2e_pdfs_conversions():
-
     pdf_paths = get_pdf_paths()
     converter = get_converter()