perf: [30388f42] Docker-Optimierung (Lead-Engine, Heatmap, Transcription)

- Konvertiert lead-engine/Dockerfile zu Multi-Stage Build mit requirements.txt.
- Aktualisiert heatmap-tool und transcription-tool auf Python 3.11-slim.
- Entfernt unnötige Build-Tools (build-essential) aus den Runtime-Images.
- Deaktiviert --reload Modus für Produktionsstabilität.

lead-engine/Dockerfile

@@ -1,15 +1,31 @@
-FROM python:3.9-slim
-
+# --- STAGE 1: Builder ---
+FROM python:3.11-slim AS builder
 WORKDIR /app
 
-COPY . .
+# Install build dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    && rm -rf /var/lib/apt/lists/*
 
-# Install dependencies required for ingestion and DB
-RUN pip install streamlit pandas requests python-dotenv fastapi "uvicorn[standard]" msal
+# Install python dependencies
+COPY requirements.txt .
+RUN pip install --user --no-cache-dir -r requirements.txt
+
+# --- STAGE 2: Runtime ---
+FROM python:3.11-slim
+WORKDIR /app
+
+# Copy installed packages
+COPY --from=builder /root/.local /root/.local
+ENV PATH=/root/.local/bin:$PATH
+
+# Copy app code
+COPY . .
 
 ENV PYTHONUNBUFFERED=1
 EXPOSE 8501
 EXPOSE 8004
+
 # Start monitor in background and streamlit in foreground
 CMD ["sh", "-c", "python monitor.py & streamlit run app.py --server.port=8501 --server.address=0.0.0.0"]