Fix ImportError: Revert to pinned requirements to use Langchain 0.2.x AgentExecutor

Fix Dockerfile: Remove software-properties-common causing apt-get install failure

Fix build: unpin requirements versions to prevent fast pip conflict errors

Fix Dockerfile: Use PyTorch CPU wheels and upgrade pip to prevent memory/timeout crashes

Switch to Docker SDK with Python 3.10 to fix build errors

Fix build: Pin python_version to 3.10 for pysqlite3-binary compatibility

Deploy to HF Space: Update config and app.py

Include streamlit config and update gitignore

Prepare for Hugging Face deployment