Creates an ensemble pipeline from multiple pipelines using majority voting.

pipes - Sequence of metamorph pipeline functions

Returns a single metamorph pipeline function that trains all sub-pipelines in :fit mode and combines their predictions via majority voting in :transform mode. Each pipeline is trained independently on the same data.

In :fit mode, stores all fitted pipeline contexts. In :transform mode, runs predictions from all pipelines and selects the most common prediction for each observation.

The ensemble pipeline can be used anywhere a regular pipeline is accepted (e.g., in evaluate-pipelines).

metamorph	.
Behaviour in mode :fit	Fits all sub-pipelines and stores their contexts
Behaviour in mode :transform	Runs all sub-pipelines and combines predictions by majority vote
Reads keys from ctx	In :transform: reads fitted sub-pipeline contexts
Writes keys to ctx	In :fit: stores all fitted contexts; In :transform: writes final prediction

See also: scicloj.metamorph.ml/evaluate-pipelines