SIENTIAPDE-1243: Initial commit of the model manager project, adding core files and configurations.

This commit introduces the initial project structure, including:
- .env.example: Example environment configuration.
- .github/workflows/quality-gate.yml: CI workflow for quality checks.
- .gitignore: Specifies intentionally untracked files that Git should ignore.
- Makefile: Automation of tasks like docker builds.
- README.md: Project documentation.
- Source code for model management, activities, utils, worker and workflows.
- Test suite.
- Dockerfile for the simulator.
- sonar-project.properties: SonarQube configuration file.
- values.yaml: Helm chart values for deployment.

simulator/Dockerfile

@@ -0,0 +1,30 @@
+# syntax=docker/dockerfile:1.4
+
+FROM python:3.11-slim
+
+# Enable use of SSH agent/socket
+# This line enables SSH during build
+# (don't forget the syntax header above)
+RUN apt-get update && apt-get install -y git openssh-client && rm -rf /var/lib/apt/lists/*
+
+# Use build-time SSH mount for Git clone
+# The SSH key will NOT remain in the image
+# IMPORTANT: this block requires BuildKit
+# and the --ssh flag during docker build
+
+# SSH config to skip host key check (safe in CI/local dev)
+RUN mkdir -p /root/.ssh && echo "StrictHostKeyChecking no" > /root/.ssh/config
+
+WORKDIR /app
+
+# Clone using SSH
+ARG GIT_REPO
+ARG GIT_BRANCH=main
+
+# Mount SSH key just for this RUN
+RUN --mount=type=ssh git clone --branch ${GIT_BRANCH} ${GIT_REPO} .
+
+# Install requirements if exists
+RUN if [ -f requirements.txt ]; then pip install --no-cache-dir -r requirements.txt; fi
+
+CMD ["python", "server.py"]