feature: update compose.yaml to set OLLAMA_MODEL environment variable; modify main.py to retrieve model from environment

feature: remove OLLAMA_MODEL from .env.example and update main.py to accept model as argument; modify compose.yaml command to specify model directly

feature: update markdown file handling and improve chunk summarization logic in main.py and chunker.py

feature: improve chunk summarization logic and extend timeout for Ollama API requests

feature: update summarization model parameters and improve markdown file encoding; enhance message handling in OllamaAPIResponse

feature: refactor OllamaAPIResponse to accept model and created_at as kwargs and simplify markdown filename generation

feature: add volume for shared Ollama models in compose.yaml

feature: refactor OllamaAPIResponse to use kwargs for dynamic attributes and simplify message handling in summarize_text_with_ollama

feature: enhance error handling in summarize_text_with_ollama by adding a default return message for structural errors

feature: refactor OllamaAPIResponse initialization to use a dictionary for dynamic attributes and improve error handling in summarize_text_with_ollama

feature: improve error handling in summarize_text_with_ollama by logging exceptions instead of raising them

feature: update pylint workflow to install dependencies from requirements.txt

feature: add docstring to pdf_reader.py for text extraction function and improve error handling in summarize_text_with_ollama

feature: add module docstrings to chunker.py and markdown_tool.py, and improve chunk_text function parameter handling

feature: add module docstrings to main.py and summarizer.py, and remove unused imports