Create history of total net worth with breakdown details and visualise it

[wilsonleong]

Tasks

• [x] Design the table structure for storing historical net worth, including breakdown and details embedded in a dict
• [x] Add a process to append values to the DB
• [x] Plot a chart to visualise the historical values in stacked bars (by asset class or product type or asset allocation)

Table on DB

• Name: HistoricalSnapshot

Data fields

• Datetime
• PortfolioSummary as a dict
• Totals in HKD, USD, GBP, EUR, SGD as a dict
• IRR as a dict
• IRR of SPX as a dict