feat!: Remove deprecated v1 api

[PeterStaar-IBM]

Removal of v1 dependencies

All references to v1 have been removed.

Removal of bare v2 test dependencies

0. removed the test_parse_v2 and brought test_parse to the same level.

1. Exposed Annotations in PdfDocument API (docling_parse/pdf_parser.py)

Added structured Pydantic models:

• PdfTocEntry: Recursive model for table of contents entries with title, level, page, and children
• PdfAnnotations: Main model containing form (dict), language (str), meta_xml (str), and table_of_contents (list of PdfTocEntry)

Added to PdfDocument class:

• _annotations cache field in init
• get_annotations() method that retrieves and caches annotations from the underlying parser
• _to_pdf_toc_entry() helper method to convert raw TOC dicts to structured PdfTocEntry objects

2. Added 9 Comprehensive Tests (tests/test_parse.py)

All tests now match or exceed the coverage of test_parse_v2.py:

1. test_load_from_bytesio_lazy: Tests loading PDFs from BytesIO with lazy=True
2. test_load_from_bytesio_eager: Tests loading PDFs from BytesIO with lazy=False
3. test_list_loaded_keys_lifecycle: Tests document key management (load/unload lifecycle)
4. test_get_page_individually: Tests accessing specific pages without loading all pages
5. test_unload_individual_pages: Tests unloading specific page ranges
6. test_boundary_types: Tests loading with CROP_BOX and MEDIA_BOX boundary types
7. test_lazy_vs_eager_pages_identical: Verifies lazy and eager loading produce identical results
8. test_get_annotations: Tests the new annotations API
9. test_annotations_match_v2_groundtruth: Verifies annotations match v2 parser groundtruth files

[mergify]

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[github-actions]

✅ DCO Check Passed

Thanks @PeterStaar-IBM, all your commits are properly signed off. 🎉

[dolfim-ibm]

lgtm