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

environment.yml

@@ -0,0 +1,19 @@
+name: openbb-invest-api
+channels:
+  - conda-forge
+  - defaults
+dependencies:
+  - python=3.12
+  - pip
+  - setuptools
+  - pip:
+    - fastapi
+    - uvicorn[standard]
+    - openbb
+    - openbb-yfinance
+    - openbb-technical
+    - pydantic-settings
+    - httpx
+    - pytest
+    - pytest-asyncio
+    - pytest-cov