Implements cosine decay with linear warmup#15
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This pull request introduces a new cosine decay schedule with linear warmup to the
Polaris.Schedulesmodule and adds corresponding tests to ensure its functionality.New Feature: Cosine Decay Schedule with Linear Warmup
lib/polaris/schedules.ex: Added thewarmup_cosine_decayfunction, which implements a learning rate schedule that first increases linearly during a warmup period and then follows a cosine decay pattern. This function includes detailed documentation and options for customization.Tests for New Feature
test/polaris/schedules_test.exs: Added a series of tests for thewarmup_cosine_decayfunction to verify its behavior, including tests for correct function arity, linear warmup phase, cosine decay phase, and respect for thealphaparameter.