Feature/respect data source in symbol data endpoint (#370)

* Respect data source in symbol data endpoint

* Respect data source in the data provider service

* Combine symbol with data source in get() of data provider service

* Improve search functionality for multiple data sources

* Update changelog

libs/common/src/lib/interfaces/timeline-position.interface.ts

@@ -1,9 +1,10 @@
-import { Currency } from '@prisma/client';
+import { Currency, DataSource } from '@prisma/client';
 import Big from 'big.js';
 
 export interface TimelinePosition {
   averagePrice: Big;
   currency: Currency;
+  dataSource: DataSource;
   firstBuyDate: string;
   grossPerformance: Big;
   grossPerformancePercentage: Big;