Changelog

See https://github.com/Fraunhofer-IESE/badgers/releases

dev_0_0_14 (unreleased)

CausalOutlierPropagationGenerator: New tabular generator that propagates outliers along causal-graph edges. First generator to rely on the causal-graph API.
Causal-graph utilities: validate_dag, topological_order, and related helpers for working with causal graphs.
Complete tabular generator benchmark coverage: All 16 tabular generators are now registered in the benchmark framework (up from 7). Added registrations for HistogramSamplingGenerator, ZScoreSamplingGenerator, LowDensitySamplingGenerator, HypersphereSamplingGenerator, GaussianNoiseClassesGenerator, RandomShiftClassesGenerator, RandomSamplingClassesGenerator, and RandomSamplingTargetsGenerator.

Generators now output NumPy arrays (breaking): Tabular and time-series generators return NumPy arrays instead of pandas DataFrames/Series. Input handling still accepts pandas DataFrames/Series.
Vectorized generators: Replaced per-row/per-column .iloc loops with batched NumPy operations for improved performance.
Two-tier sampler API: The sampler parameter is split into within_distribution_sampler and out_of_distribution_sampler.
Explicit column_mapping parameter: The causal-graph API now requires an explicit column_mapping parameter.
Benchmark outputs moved to .benchmarks/: Results and baselines are now stored in .benchmarks/results/ and .benchmarks/baselines/ (gitignored) instead of benchmarks/results/ and benchmarks/baselines/.

node_to_index parameter from the causal-graph API (replaced by column_mapping).

Separated tests from benchmarks: Generator correctness tests now live in tests/generators/ as standalone pytest functions with fixtures, independent of the benchmark framework. The benchmarks/checks/ directory and FunctionalCheck infrastructure have been removed. Benchmarks now focus exclusively on performance measurement (time/memory). (9 commits: 943e230..56fee5d)

Pytest fixtures for each data type: tabular_small/tabular_large, time_series_sine/time_series_walk, graph_erdos_renyi, text_word_list
Test conftest files in tests/generators/{tabular_data,time_series,graph,text}/