handle situations where bonds (or equity) data is missing

[jdhoffa]

It is possible that the datasets Bonds_results_portfolio.rds, Equity_results_portfolio.rds (or both) do not exist.

Currently, if that is the case, the dashboard generation process will error out entirely:

workflow.pacta.dashboard/R/prepare_pacta_dashboard_data.R

Lines 55 to 58 in 6b09542

	equity_results_portfolio <- readRDS(file.path(analysis_output_dir, "Equity_results_portfolio.rds"))
	bonds_results_portfolio <- readRDS(file.path(analysis_output_dir, "Bonds_results_portfolio.rds"))
	equity_results_company <- readRDS(file.path(analysis_output_dir, "Equity_results_company.rds"))
	bonds_results_company <- readRDS(file.path(analysis_output_dir, "Bonds_results_company.rds"))

The prepare_pacta_dashboard_data should handle situations where these datasets are not available gracefully.

In particular, it should try to prepare every dataset that it can. If an input dataset is unavailable, it should warn, but continue with the preparation process.

If it cannot prepare a particular output dataset, it should warn but proceed.