feat: implementar 12 mejoras, tests, docs y optimizaciones

- Fase A: license templates, search history, cost estimator
- Fase B: import URL, bulk ZIP, batch download
- Fase C: comparison mode, mesh validation, measurement tool
- Fase D: cross-section clipping, overhang heatmap, layer animation
- Refactor Pydantic/SQLAlchemy warnings
- 24 tests pytest
- README actualizado
- WebP thumbnails, lazy loading, cache headers

Dockerfile

@@ -0,0 +1,23 @@
+FROM python:3.12-slim
+
+WORKDIR /app
+
+# Install uv
+COPY --from=ghcr.io/astral-sh/uv:latest /uv /usr/local/bin/uv
+
+# Copy project files
+COPY pyproject.toml .python-version ./
+COPY app/ ./app/
+COPY static/ ./static/
+
+# Create directories for data
+RUN mkdir -p uploads thumbnails images
+
+# Install dependencies and project
+RUN uv sync --no-dev
+
+# Expose port
+EXPOSE 8000
+
+# Run server
+CMD ["uv", "run", "uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]