feat: replace Whisper with Deepgram ASR + speaker diarization

Dockerfile

@@ -0,0 +1,20 @@
+FROM python:3.11-slim
+
+WORKDIR /app
+
+# Install system deps
+RUN apt-get update && apt-get install -y \
+    ffmpeg \
+    && rm -rf /var/lib/apt/lists/*
+
+# Install Python deps
+COPY backend/requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy code
+COPY backend/ ./backend/
+COPY frontend/ ./frontend/
+
+EXPOSE 8000
+
+CMD ["python", "backend/main.py"]