Sync project metadata with `pyproject.toml`

Updated scripts and backend to dynamically retrieve project name and version from `pyproject.toml`. This ensures consistent metadata across the OpenAPI client generation and the FastAPI application.

make_openapi_client.sh

 #!/bin/bash
 
 # Extract values from pyproject.toml
-PYPROJECT_FILE="$(dirname "$0")/pyproject.toml"
+PYPROJECT_FILE="$(dirname "$0")/heidi-v2/pyproject.toml"
 
 VERSION=$(grep -Po '(?<=version = ")[^"]*' "$PYPROJECT_FILE")
 NAME=$(grep -Po '(?<=name = ")[^"]*' "$PYPROJECT_FILE")