Refactor regulation policies

[Femkemilene]

Refactor regulatory policies. New code is more DRY and 30x faster than before.

There are two logical changes:

• capacity now approaches MWKA more smoothly
• The regulation correction only works when demand is growing, in line with E3ME

I've kept the code to compare outputs, but will of course tidy up after review. For testing:

• MWKA is tested in baseline
• In the baseline, there are regulatory policies in power and heat, but not in transport
• Exogenous sales are off in S0 and S2, so need to be manually added for testing.

MWKA is reverted back to its old consistent behaviour, so that there's no guessing what the policy does (there were 3 complicated conditions, which broke the logic of using exogenous capacity for partial data).

Pim, feel free to delegate to someone else at CE!

[Copilot]

Pull Request Overview

This PR refactors regulatory policies across FTT modules to improve performance (30x faster) and code maintainability by centralizing common regulatory policy logic. The refactor also aligns regulation correction behavior with E3ME by only applying corrections when demand is growing, and makes capacity approach MWKA more smoothly.

• Centralizes regulatory policy logic into a new shared module ftt_regulatory_policies.py
• Updates Transport, Power, and Heat modules to use the new centralized functions
• Adds performance timing and comparison checks between old and new implementations

Reviewed Changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 9 comments.

Show a summary per file

File	Description
settings.ini	Disables most modules for testing, enabling only FTT-P
SourceCode/model_class.py	Adds performance timing measurement starting from 2011
SourceCode/ftt_core/ftt_regulatory_policies.py	New module containing centralized regulatory policy functions
SourceCode/Transport/ftt_tr_main.py	Refactors to use new regulatory policy functions with comparison logic
SourceCode/Power/ftt_p_main.py	Updates documentation and implements new regulatory policy approach
SourceCode/Power/fft_p_regulatory_policies.py	Simplifies old policy implementation for comparison purposes
SourceCode/Heat/ftt_h_main.py	Integrates new regulatory policy functions with comparison checks

[Femkemilene]

Me and Pim have discussed and agree with the current simplified implementation. Testing still left to be done.

[Femkemilene]

This is a good first pull request. A bit more context:

FTT has two types of policies, regulatory policies such as phase-outs, and price policies such as subsidies. In this bit of code, we're refactoring the regulatory policies so that all the different FTT models use the same code. An important element of reviewing is to say whether the code is understandable on sight.

I've kept in some of the code to compare with the old implementation. Once you're happy with the code, it's my job to clean everything up and to resolve the merge conflicts.

[Femkemilene]

@fciscoamsler: what's the latest on this one?