feat: integrate Alpha Vantage news sentiment + fix technical indicators

- Add alphavantage_service.py for per-article sentiment scores
- Add /stock/{symbol}/news-sentiment endpoint (Alpha Vantage)
- Merge Alpha Vantage data into /stock/{symbol}/sentiment
- Fix technical indicators: use close_ prefixed keys from OpenBB
- Increase historical data to 400 days for SMA_200 calculation
- Add .gitignore, handle Finnhub 403 on premium endpoints
- Add INVEST_API_ALPHAVANTAGE_API_KEY config

technical_service.py

@@ -12,7 +12,7 @@ PROVIDER = "yfinance"
 
 
 async def get_technical_indicators(
-    symbol: str, days: int = 200
+    symbol: str, days: int = 400
 ) -> dict[str, Any]:
     """Compute key technical indicators for a symbol."""
     from datetime import datetime, timedelta
@@ -36,7 +36,7 @@ async def get_technical_indicators(
     try:
         rsi = await asyncio.to_thread(obb.technical.rsi, data=hist.results, length=14)
         rsi_items = _extract_latest(rsi)
-        result["rsi_14"] = rsi_items.get("RSI_14")
+        result["rsi_14"] = rsi_items.get("close_RSI_14")
     except Exception:
         logger.warning("RSI calculation failed for %s", symbol, exc_info=True)
         result["rsi_14"] = None
@@ -48,9 +48,9 @@ async def get_technical_indicators(
         )
         macd_items = _extract_latest(macd)
         result["macd"] = {
-            "macd": macd_items.get("MACD_12_26_9"),
+            "macd": macd_items.get("close_MACD_12_26_9"),
-            "signal": macd_items.get("MACDs_12_26_9"),
+            "signal": macd_items.get("close_MACDs_12_26_9"),
-            "histogram": macd_items.get("MACDh_12_26_9"),
+            "histogram": macd_items.get("close_MACDh_12_26_9"),
         }
     except Exception:
         logger.warning("MACD calculation failed for %s", symbol, exc_info=True)
@@ -63,7 +63,7 @@ async def get_technical_indicators(
                 obb.technical.sma, data=hist.results, length=period
             )
             sma_items = _extract_latest(sma)
-            result[f"sma_{period}"] = sma_items.get(f"SMA_{period}")
+            result[f"sma_{period}"] = sma_items.get(f"close_SMA_{period}")
         except Exception:
             logger.warning("SMA_%d failed for %s", period, symbol, exc_info=True)
             result[f"sma_{period}"] = None
@@ -75,7 +75,7 @@ async def get_technical_indicators(
                 obb.technical.ema, data=hist.results, length=period
             )
             ema_items = _extract_latest(ema)
-            result[f"ema_{period}"] = ema_items.get(f"EMA_{period}")
+            result[f"ema_{period}"] = ema_items.get(f"close_EMA_{period}")
         except Exception:
             logger.warning("EMA_%d failed for %s", period, symbol, exc_info=True)
             result[f"ema_{period}"] = None
@@ -87,9 +87,9 @@ async def get_technical_indicators(
         )
         bb_items = _extract_latest(bbands)
         result["bollinger_bands"] = {
-            "upper": bb_items.get("BBU_20_2.0"),
+            "upper": bb_items.get("close_BBU_20_2.0"),
-            "middle": bb_items.get("BBM_20_2.0"),
+            "middle": bb_items.get("close_BBM_20_2.0"),
-            "lower": bb_items.get("BBL_20_2.0"),
+            "lower": bb_items.get("close_BBL_20_2.0"),
         }
     except Exception:
         logger.warning("Bollinger Bands failed for %s", symbol, exc_info=True)
@@ -108,7 +108,9 @@ def _extract_latest(result: Any) -> dict[str, Any]:
     items = result.results
     if isinstance(items, list) and items:
         last = items[-1]
-        return last.model_dump() if hasattr(last, "model_dump") else vars(last)
+        if hasattr(last, "model_dump"):
+            return last.model_dump()
+        return vars(last) if vars(last) else {}
     return {}