feat(ai-service): container YOLO FastAPI pour détection plantes

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ai-service/Dockerfile

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+FROM python:3.11-slim
+
+WORKDIR /app
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY main.py .
+
+CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8070"]