feat: OpenBB Investment Analysis API

REST API wrapping OpenBB SDK for stock data, sentiment analysis,
technical indicators, macro data, and rule-based portfolio analysis.

- Stock data via yfinance (quote, profile, metrics, financials, historical, news)
- News sentiment via Alpha Vantage (per-article, per-ticker scores)
- Analyst data via Finnhub (recommendations, insider trades, upgrades)
- Macro data via FRED (Fed rate, CPI, GDP, unemployment, treasury yields)
- Technical indicators via openbb-technical (RSI, MACD, SMA, EMA, Bollinger)
- Rule-based portfolio analysis engine (BUY_MORE/HOLD/SELL)
- Stock discovery (gainers, losers, active, undervalued, growth)
- 102 tests, all passing

tests/test_routes_technical.py

@@ -0,0 +1,42 @@
+from unittest.mock import patch, AsyncMock
+
+import pytest
+from httpx import AsyncClient, ASGITransport
+
+from main import app
+
+
+@pytest.fixture
+async def client():
+    transport = ASGITransport(app=app)
+    async with AsyncClient(transport=transport, base_url="http://test") as c:
+        yield c
+
+
+@pytest.mark.asyncio
+@patch("routes_technical.technical_service.get_technical_indicators", new_callable=AsyncMock)
+async def test_stock_technical(mock_tech, client):
+    mock_tech.return_value = {
+        "symbol": "AAPL",
+        "rsi_14": 55.3,
+        "macd": {"macd": 1.5, "signal": 1.2, "histogram": 0.3},
+        "sma_20": 180.0,
+        "sma_50": 175.0,
+        "sma_200": 170.0,
+        "ema_12": 179.0,
+        "ema_26": 176.0,
+        "bollinger_bands": {"upper": 190.0, "middle": 180.0, "lower": 170.0},
+        "signals": ["RSI 55.3: Neutral", "MACD histogram positive (bullish momentum)"],
+    }
+    resp = await client.get("/api/v1/stock/AAPL/technical")
+    assert resp.status_code == 200
+    data = resp.json()["data"]
+    assert data["symbol"] == "AAPL"
+    assert data["rsi_14"] == 55.3
+    assert len(data["signals"]) == 2
+
+
+@pytest.mark.asyncio
+async def test_invalid_symbol_technical(client):
+    resp = await client.get("/api/v1/stock/INVALID!!!/technical")
+    assert resp.status_code == 400