feat: Add Gradio UI apps for AI services

- embeddings.py: BGE embeddings demo with similarity
- stt.py: Whisper speech-to-text demo
- tts.py: XTTS text-to-speech demo
- theme.py: Shared DaviesTechLabs Gradio theme
- K8s deployments for each app

Dockerfile

@@ -0,0 +1,36 @@
+FROM python:3.13-slim
+
+WORKDIR /app
+
+# Install uv for fast, reliable package management
+COPY --from=ghcr.io/astral-sh/uv:latest /uv /usr/local/bin/uv
+
+# Install system dependencies for audio processing
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    curl \
+    ffmpeg \
+    libsndfile1 \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy requirements first for better caching
+COPY requirements.txt .
+RUN uv pip install --system --no-cache -r requirements.txt
+
+# Copy application code
+COPY *.py .
+
+# Set environment variables
+ENV PYTHONUNBUFFERED=1
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV GRADIO_SERVER_NAME=0.0.0.0
+ENV GRADIO_SERVER_PORT=7860
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=10s --retries=3 \
+    CMD curl -f http://localhost:7860/ || exit 1
+
+# Expose Gradio port
+EXPOSE 7860
+
+# Run the application (override with specific app)
+CMD ["python", "app.py"]