feat: add Alpha Vantage and Polygon.io OHLCV data providers (#469)

- Add AlphaVantageOHLCVDataProvider (market='ALPHA_VANTAGE') with API key via MarketCredential
- Add PolygonOHLCVDataProvider (market='POLYGON') with API key via MarketCredential
- Both follow same pattern as Yahoo/CCXT: auto-selected based on market value
- Add alpha_vantage and polygon-api-client dependencies
- Register both as default data providers
- Add comprehensive unit tests (32 tests with mocked external calls)

Author: MDUYN

investing_algorithm_framework/__init__.py

@@ -29,6 +29,7 @@
     CSVOHLCVDataProvider, CSVTickerDataProvider, \
     CCXTOHLCVDataProvider, CCXTTickerDataProvider, \
     PandasOHLCVDataProvider, YahooOHLCVDataProvider, \
+    AlphaVantageOHLCVDataProvider, PolygonOHLCVDataProvider, \
     AWSS3StorageStateHandler
 from .create_app import create_app
 from .download_data import download, download_v2, DownloadResult, \
@@ -117,6 +118,8 @@
     "CCXTOHLCVDataProvider",
     "CCXTTickerDataProvider",
     "YahooOHLCVDataProvider",
+    "AlphaVantageOHLCVDataProvider",
+    "PolygonOHLCVDataProvider",
     "DataProvider",
     "get_annual_volatility",
     "get_sortino_ratio",

investing_algorithm_framework/infrastructure/__init__.py

@@ -14,7 +14,8 @@
     CSVTickerDataProvider, get_default_data_providers, \
     get_default_ohlcv_data_providers, CCXTOHLCVDataProvider, \
     CCXTTickerDataProvider, PandasOHLCVDataProvider, \
-    YahooOHLCVDataProvider
+    YahooOHLCVDataProvider, AlphaVantageOHLCVDataProvider, \
+    PolygonOHLCVDataProvider
 from .order_executors import CCXTOrderExecutor, BacktestOrderExecutor
 from .portfolio_providers import CCXTPortfolioProvider
 
@@ -53,5 +54,7 @@
     "BacktestOrderExecutor",
     "PandasOHLCVDataProvider",
     "YahooOHLCVDataProvider",
+    "AlphaVantageOHLCVDataProvider",
+    "PolygonOHLCVDataProvider",
     "BacktestService",
 ]

investing_algorithm_framework/infrastructure/data_providers/__init__.py

@@ -2,6 +2,8 @@
 from .csv import CSVOHLCVDataProvider, CSVTickerDataProvider
 from .pandas import PandasOHLCVDataProvider
 from .yahoo import YahooOHLCVDataProvider
+from .alpha_vantage import AlphaVantageOHLCVDataProvider
+from .polygon import PolygonOHLCVDataProvider
 
 
 def get_default_data_providers():
@@ -15,6 +17,8 @@ def get_default_data_providers():
         CCXTOHLCVDataProvider(),
         CCXTTickerDataProvider(),
         YahooOHLCVDataProvider(),
+        AlphaVantageOHLCVDataProvider(),
+        PolygonOHLCVDataProvider(),
     ]
 
 
@@ -28,6 +32,8 @@ def get_default_ohlcv_data_providers():
     return [
         CCXTOHLCVDataProvider(),
         YahooOHLCVDataProvider(),
+        AlphaVantageOHLCVDataProvider(),
+        PolygonOHLCVDataProvider(),
     ]
 
 
@@ -40,4 +46,6 @@ def get_default_ohlcv_data_providers():
     'get_default_ohlcv_data_providers',
     'PandasOHLCVDataProvider',
     'YahooOHLCVDataProvider',
+    'AlphaVantageOHLCVDataProvider',
+    'PolygonOHLCVDataProvider',
 ]