Make additional market metrics optional (#105)

* Make market metrics optional

* Enable manual workflow triggering

.github/workflows/python-app.yml

@@ -3,6 +3,12 @@ name: Python application
 on:
   push:
     branches: [ master ]
+
+  workflow_dispatch:
+    inputs:
+      branch:
+        description: 'The branch to build'
+        required: true
 
 jobs:
   build:

tastytrade/metrics.py

@@ -52,23 +52,23 @@ class MarketMetricInfo(TastytradeJsonDataclass):
     Contains lots of useful information, like IV rank, IV percentile and beta.
     """
     symbol: str
-    implied_volatility_index: Decimal
-    implied_volatility_index_5_day_change: Decimal
+    implied_volatility_index: Optional[Decimal] = None
+    implied_volatility_index_5_day_change: Optional[Decimal] = None
     implied_volatility_index_rank: Optional[str] = None
-    tos_implied_volatility_index_rank: Decimal
-    tw_implied_volatility_index_rank: Decimal
-    tos_implied_volatility_index_rank_updated_at: datetime
-    implied_volatility_index_rank_source: str
+    tos_implied_volatility_index_rank: Optional[Decimal] = None
+    tw_implied_volatility_index_rank: Optional[Decimal] = None
+    tos_implied_volatility_index_rank_updated_at: Optional[datetime] = None
+    implied_volatility_index_rank_source: Optional[str] = None
     implied_volatility_percentile: Optional[str] = None
-    implied_volatility_updated_at: datetime
-    liquidity_rating: int
+    implied_volatility_updated_at: Optional[datetime] = None
+    liquidity_rating: Optional[int] = None
     updated_at: datetime
-    option_expiration_implied_volatilities: List[OptionExpirationImpliedVolatility]  # noqa: E501
-    beta: Decimal
-    corr_spy_3month: Decimal
+    option_expiration_implied_volatilities: Optional[List[OptionExpirationImpliedVolatility]] = None  # noqa: E501
+    beta: Optional[Decimal] = None
+    corr_spy_3month: Optional[Decimal] = None
     market_cap: Decimal
-    price_earnings_ratio: Decimal
-    earnings_per_share: Decimal
+    price_earnings_ratio: Optional[Decimal] = None
+    earnings_per_share: Optional[Decimal] = None
     dividend_rate_per_share: Optional[Decimal] = None
     implied_volatility_30_day: Optional[Decimal] = None
     historical_volatility_30_day: Optional[Decimal] = None