feat: likelihood breakpointer #103
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MaxPastukhov15
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MaxPastukhov15
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This PR implements and tests the LikelihoodBreakpointer, which stops the EM-like iterative pipeline when the change in log-likelihood between consecutive iterations falls below a specified threshold (|L_{t+1} - L_t| < threshold).
Key changes:
Added LikelihoodBreakpointer class with proper convergence logic and validation.
Wrote unit tests using mocked likelihood sequences to reliably verify convergence detection, first-call behavior, and instance reuse after reset.
Closes #52