heuristic_line_break_threshold, along with other heuristic constants not doing anything

I noticed that even when testing extreme values of heuristic_line_break_threshold, heuristic_overlap_ratio, and heuristic_h_tolerance there was no change in the output. This led me to examine their use in the library, and it appears heuristic_line_break_threshold is never once utilized outside of the class parameter declaration. The other two are used, but still do nothing. Were these features simply released prematurely, or am I doing something wrong?

This is my basic logic for getting output:

`from textractor.data.text_linearization_config import TextLinearizationConfig
from textractor import Textractor

extractor = Textractor(profile_name="default")

document = extractor.analyze_document(
file_source=png_path,
features=[TextractFeatures.TABLES, TextractFeatures.SIGNATURES, TextractFeatures.LAYOUT],
save_image=True
)

config = TextLinearizationConfig(
title_prefix="# ",
section_header_prefix="## ",
add_prefixes_and_suffixes_in_text=True,
heuristic_line_break_threshold=0.9,
heuristic_overlap_ratio=0.5,
table_linearization_format="markdown",
)
print(document.get_text(config=config))`

Start with textractor.data.text_linearization_config.TextLinearizationConfig and the document.get_text(config=config) entry point shown in the report. Reproduce the example while varying heuristic_line_break_threshold, heuristic_overlap_ratio, and heuristic_h_tolerance; done means determining whether each setting is intended to affect output and capturing the result in tests or documentation.

Written by the indexing model from the issue text.