refactor: migrate to uv package manager with pyproject.toml

Dockerfile

@@ -1,16 +1,19 @@
 FROM python:3.14-slim
 
-# Install FFmpeg
+# Install FFmpeg and curl (for uv installation)
 RUN apt-get update && \
-    apt-get install -y --no-install-recommends ffmpeg && \
+    apt-get install -y --no-install-recommends ffmpeg curl && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/*
 
+# Install uv
+COPY --from=ghcr.io/astral-sh/uv:latest /uv /usr/local/bin/uv
+
 WORKDIR /app
 
 # Install Python dependencies
-COPY requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt
+COPY pyproject.toml .
+RUN uv pip install --system --no-cache .
 
 # Copy application
 COPY app/ ./app/