feat(ptdf sensi): add PTDF Sensitivities in Ampere (function type: BRANCH_CURRENT and variable type: INJECTION_ACTIVE_POWER) #1544
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Please check if the PR fulfills these requirements
Does this PR already have an issue describing the problem?
Fixes #1060
What kind of change does this PR introduce?
Add PTDF sensitivity in ampere support, will be used later for loopflow computation in Ampere and relative margin objective function optimization in Ampere
What is the current behavior?
Currently, the PTDF sensitivity in ampere is not supported, and the existing unit tests cover only one side of the cases.
What is the new behavior (if this is a feature change)?
Does this PR introduce a breaking change or deprecate an API?