Refactor Docker setup and migration scripts

- Updated Dockerfile to set permissions for the entrypoint script and defined the entrypoint for the container.
- Consolidated Alembic migration history into a single initial migration file and removed obsolete revision files.
- Added a new script to run Alembic migrations before starting the application.
- Updated changelog to reflect changes in migration handling and Docker setup.
- Enhanced pytest configuration for coverage reporting and excluded specific files from coverage calculations.

Dockerfile

@@ -102,10 +102,13 @@ RUN pip install --upgrade pip \
 
 COPY . /app
 
-RUN chown -R appuser:app /app
+RUN chown -R appuser:app /app \
+    && chmod +x /app/scripts/docker-entrypoint.sh
 
 USER appuser
 
 EXPOSE 8003
 
+ENTRYPOINT ["/app/scripts/docker-entrypoint.sh"]
+
 CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8003", "--workers", "4"]