docs(docs): add tech-stack badges to README (shields.io for-the-badge) (#273)

README.md

@@ -2,6 +2,52 @@
 
 Portfolio-grade end-to-end retail demand forecasting system.
 
+<!-- Tech-stack badges (shields.io · for-the-badge) -->
+
+[![License: MIT](https://img.shields.io/badge/License-MIT-3DA639?style=for-the-badge)](LICENSE)
+[![Release](https://img.shields.io/github/v/release/w7-mgfcode/ForecastLabAI?style=for-the-badge&color=blueviolet&logo=github&logoColor=white)](https://github.com/w7-mgfcode/ForecastLabAI/releases)
+[![CI](https://img.shields.io/github/actions/workflow/status/w7-mgfcode/ForecastLabAI/ci.yml?branch=dev&style=for-the-badge&label=CI&logo=githubactions&logoColor=white)](https://github.com/w7-mgfcode/ForecastLabAI/actions/workflows/ci.yml)
+[![Python 3.12+](https://img.shields.io/badge/Python-3.12%2B-3776AB?style=for-the-badge&logo=python&logoColor=white)](pyproject.toml)
+
+**Backend**
+
+![FastAPI](https://img.shields.io/badge/FastAPI-009688?style=for-the-badge&logo=fastapi&logoColor=white)
+![Pydantic v2](https://img.shields.io/badge/Pydantic_v2-E92063?style=for-the-badge&logo=pydantic&logoColor=white)
+![SQLAlchemy 2.0](https://img.shields.io/badge/SQLAlchemy_2.0-D71F00?style=for-the-badge&logo=sqlalchemy&logoColor=white)
+![PostgreSQL 16](https://img.shields.io/badge/PostgreSQL_16-4169E1?style=for-the-badge&logo=postgresql&logoColor=white)
+![pgvector](https://img.shields.io/badge/pgvector-336791?style=for-the-badge&logo=postgresql&logoColor=white)
+![Alembic](https://img.shields.io/badge/Alembic-6BA539?style=for-the-badge)
+![structlog](https://img.shields.io/badge/structlog-FAC15A?style=for-the-badge&logoColor=black)
+
+**Frontend**
+
+![React 19](https://img.shields.io/badge/React_19-20232A?style=for-the-badge&logo=react&logoColor=61DAFB)
+![TypeScript](https://img.shields.io/badge/TypeScript-3178C6?style=for-the-badge&logo=typescript&logoColor=white)
+![Vite 7](https://img.shields.io/badge/Vite_7-646CFF?style=for-the-badge&logo=vite&logoColor=white)
+![Tailwind 4](https://img.shields.io/badge/Tailwind_4-06B6D4?style=for-the-badge&logo=tailwindcss&logoColor=white)
+![shadcn/ui](https://img.shields.io/badge/shadcn/ui-000000?style=for-the-badge&logo=shadcnui&logoColor=white)
+![TanStack Query](https://img.shields.io/badge/TanStack_Query-FF4154?style=for-the-badge&logo=reactquery&logoColor=white)
+
+**ML / AI**
+
+![scikit-learn](https://img.shields.io/badge/scikit--learn-F7931E?style=for-the-badge&logo=scikitlearn&logoColor=white)
+![LightGBM](https://img.shields.io/badge/LightGBM-1FBAEE?style=for-the-badge)
+![XGBoost](https://img.shields.io/badge/XGBoost-FF6F00?style=for-the-badge)
+![PydanticAI](https://img.shields.io/badge/PydanticAI-E92063?style=for-the-badge&logo=pydantic&logoColor=white)
+![OpenAI](https://img.shields.io/badge/OpenAI-412991?style=for-the-badge&logo=openai&logoColor=white)
+![Anthropic](https://img.shields.io/badge/Anthropic-191919?style=for-the-badge&logo=anthropic&logoColor=white)
+![Ollama](https://img.shields.io/badge/Ollama-000000?style=for-the-badge&logo=ollama&logoColor=white)
+
+**Tooling**
+
+![Docker](https://img.shields.io/badge/Docker-2496ED?style=for-the-badge&logo=docker&logoColor=white)
+![uv](https://img.shields.io/badge/uv-DE5FE9?style=for-the-badge&logo=astral&logoColor=white)
+![pnpm](https://img.shields.io/badge/pnpm-F69220?style=for-the-badge&logo=pnpm&logoColor=white)
+![GitHub Actions](https://img.shields.io/badge/GitHub_Actions-2088FF?style=for-the-badge&logo=githubactions&logoColor=white)
+![Ruff](https://img.shields.io/badge/Ruff-FCC21B?style=for-the-badge&logo=ruff&logoColor=black)
+![mypy --strict](https://img.shields.io/badge/mypy_--strict-1F5082?style=for-the-badge)
+![pytest](https://img.shields.io/badge/pytest-0A9EDC?style=for-the-badge&logo=pytest&logoColor=white)
+
 ## Features
 
 - **Data Platform**: Multi-table mini warehouse (store/product/calendar + sales + price/promo/inventory signals)