feat(phase-0): scaffold backend + web + docker + DB schema

- docker-compose.yml: timescaledb-ha (timescaledb 2.27 + vectorscale + pgvector + pgai)
  + backend (FastAPI, CUDA 12.1) + web (Next.js 14)
- docker-compose.gpu.yml: GPU profile overlay for RTX 3070 Ti
- build.bat: Windows bootstrap, auto-detects nvidia-smi and selects GPU/CPU compose
- backend: Dockerfile, pyproject.toml, FastAPI skeleton with /health and /health/db
- DB migration 001_init.sql: symbols (with trigram search), ohlcv_daily/1m (hypertables),
  macro_daily, trading_value_daily, news (vector embedding), predictions
  (with user_triggered flag for on-demand UX), prediction_outcomes, model_performance
- web: Next.js 14 + Tailwind + lightweight-charts placeholder
- README: KIS/DART/HuggingFace token issuance guides + 10 seed tickers + run instructions

backend/pyproject.toml

@@ -0,0 +1,65 @@
+[project]
+name = "stock_chart_site_backend"
+version = "0.0.1"
+description = "Stock chart + prediction backend (FastAPI + Chronos + LightGBM + KR-FinBERT)"
+requires-python = ">=3.11,<3.13"
+
+dependencies = [
+    # web
+    "fastapi==0.111.0",
+    "uvicorn[standard]==0.30.0",
+    "pydantic==2.7.1",
+    "pydantic-settings==2.3.0",
+
+    # db
+    "sqlalchemy==2.0.30",
+    "psycopg[binary]==3.1.19",
+    "alembic==1.13.1",
+
+    # data
+    "pandas==2.2.2",
+    "numpy==1.26.4",
+    "pykrx==1.0.45",
+    "yfinance==0.2.40",
+    "feedparser==6.0.11",
+    "requests==2.32.3",
+    "httpx==0.27.0",
+    "beautifulsoup4==4.12.3",
+    "lxml==5.2.2",
+
+    # ml
+    "transformers==4.41.2",
+    "tokenizers==0.19.1",
+    "sentencepiece==0.2.0",
+    "scikit-learn==1.5.0",
+    "lightgbm==4.3.0",
+    "ta==0.11.0",
+
+    # scheduler
+    "apscheduler==3.10.4",
+    "pytz==2024.1",
+
+    # utils
+    "python-dotenv==1.0.1",
+    "loguru==0.7.2",
+    "tenacity==8.3.0",
+]
+
+[project.optional-dependencies]
+dev = [
+    "pytest==8.2.1",
+    "ruff==0.4.7",
+    "mypy==1.10.0",
+]
+
+[build-system]
+requires = ["setuptools>=68"]
+build-backend = "setuptools.build_meta"
+
+[tool.setuptools.packages.find]
+where = ["."]
+include = ["app*"]
+
+[tool.ruff]
+line-length = 100
+target-version = "py311"