Inflation costs during construction [v3.9.42]

[softwareengineerprogrammer]

Description

1. Include inflation costs during construction in CAPEX line items for SAM Economic Models. Total CAPEX can now be summed from relevant line items in Capital Costs (as opposed to status quo, where missing inflation costs means users cannot manually check sums themselves from output)
   1. Add Inflation costs during construction output parameter for SAM-EM with tooltip text: "The calculated amount of cost escalation due to inflation over the construction period." (TODO to evaluate whether to output this for other economic models)
   2. Add Accrued financing during construction output parameter tooltip text: "The accrued inflation on total capital costs over the construction period, as defined by Inflation Rate During Construction. For SAM Economic Models, this is calculated automatically by compounding Inflation Rate over Construction Years if Inflation Rate During Construction is not provided."
2. Implement partial support for multiple construction years for SAM Economic Models. Note that limitation of 1 construction year is still retained for now, however, since full support requires additional implementation; tracking in Support multiple construction years for SAM Economic Models NREL/GEOPHIRES-X#406
   1. Automatically calculate inflation costs during construction from inflation rate for SAM Economic Models if Inflation Rate During Construction parameter is not provided (TODO to evaluate whether this should also be done for other economic models)
   2. Document Fervo_Project_Cape-4 construction years = 1 with note for 15% Inflation Rate During Construction documenting that it is equivalent to a 3-year period of higher inflation rate (4.769%) to hedge against construction delays and short-term inflation volatility
3. Follow-up tooltip text TODOs/fixes for Parameterize indirect cost factor & contingency NREL/GEOPHIRES-X#383
4. Tweak Fervo_Project_Cape-4 stimulation cost adjustment factor documentation to remove probably-erroneous claim about typical range for NOAK being $0.5-2M (TODO/follow-up item to evaluate whether to adjust the stimulation cost upward, $4M may be more appropriate)

Testing & Verification

1. Unit tests
   1. Regenerated SAM-EM examples and verified only change is addition of Inflation costs during construction output. Manually verified that capital cost line items sum up to Total CAPEX
   2. test_accrued_financing_during_construction
2. Web interface:

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TODO:

1. Total CAPEX discrepancy before/after accrued construction financing (in docs and capital costs output): e6b9fe8, 922be29