feat: add complete BRAIN operators catalog (71 operators with categories)

data/operators.csv

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+name,category,scope,level,description
+abs,Mathematical,Cross-sectional,1,Absolute value
+bucket,Mathematical,Cross-sectional,2,Assign to buckets
+correlation,Statistical,Cross-sectional,2,Pearson correlation
+covariance,Statistical,Cross-sectional,2,Covariance
+equal,Logical,Cross-sectional,1,Equality check
+filter,Conditional,Cross-sectional,2,Filter values
+fraction,Mathematical,Cross-sectional,1,Fractional part
+greater,Logical,Cross-sectional,1,Greater-than comparison
+group_count,Group,Cross-sectional,2,Count within group
+group_max,Group,Cross-sectional,2,Maximum within group
+group_mean,Group,Cross-sectional,2,Mean within group
+group_median,Group,Cross-sectional,2,Median within group
+group_min,Group,Cross-sectional,2,Minimum within group
+group_neutralize,Group,Cross-sectional,2,Neutralize within group
+group_rank,Group,Cross-sectional,2,Rank within group
+group_sum,Group,Cross-sectional,2,Sum within group
+group_zscore,Group,Cross-sectional,2,Z-score within group
+if_else,Conditional,Cross-sectional,1,Conditional selection
+indneutralize,Group,Cross-sectional,2,Industry neutralize
+less,Logical,Cross-sectional,1,Less-than comparison
+log,Mathematical,Cross-sectional,1,Natural logarithm
+market_neutralize,Group,Cross-sectional,2,Market neutralize
+mask,Conditional,Cross-sectional,2,Mask values
+max,Mathematical,Cross-sectional,1,Element-wise maximum
+min,Mathematical,Cross-sectional,1,Element-wise minimum
+pasteurize,Data Quality,Cross-sectional,1,Handle outliers
+power,Mathematical,Cross-sectional,1,Power function
+quantile,Statistical,Cross-sectional,1,Quantile transform
+rank,Statistical,Cross-sectional,1,Cross-sectional rank
+regression_neut,Statistical,Cross-sectional,2,Regression neutralize
+relu,Mathematical,Cross-sectional,1,Rectified linear unit
+sigmoid,Mathematical,Cross-sectional,1,Sigmoid function
+sign,Mathematical,Cross-sectional,1,Sign function
+sqrt,Mathematical,Cross-sectional,1,Square root
+tail,Statistical,Cross-sectional,2,Tail values
+tanh,Mathematical,Cross-sectional,1,Hyperbolic tangent
+trade_when,Conditional,Time-series,3,Conditional trading
+truncate,Data Quality,Cross-sectional,1,Truncate weights
+ts_argmax,Time-Series,Time-series,2,Time of maximum
+ts_argmin,Time-Series,Time-series,2,Time of minimum
+ts_av_diff,Time-Series,Time-series,2,Average difference
+ts_backfill,Data Quality,Time-series,1,Fill missing values
+ts_correlation,Time-Series,Time-series,2,Rolling correlation
+ts_covariance,Time-Series,Time-series,2,Rolling covariance
+ts_decay_exp_window,Time-Series,Time-series,2,Exponential decay window
+ts_decay_linear,Time-Series,Time-series,2,Linear decay
+ts_delay,Time-Series,Time-series,1,Lag operator
+ts_delta,Time-Series,Time-series,1,Difference over window
+ts_entropy,Time-Series,Time-series,2,Rolling entropy
+ts_hump,Time-Series,Time-series,2,Hump detection
+ts_kurtosis,Time-Series,Time-series,2,Rolling kurtosis
+ts_max,Time-Series,Time-series,1,Rolling maximum
+ts_mean,Time-Series,Time-series,1,Rolling mean
+ts_min,Time-Series,Time-series,1,Rolling minimum
+ts_moment,Time-Series,Time-series,2,Rolling moment
+ts_product,Time-Series,Time-series,2,Rolling product
+ts_rank,Time-Series,Time-series,2,Rank over time
+ts_regression,Time-Series,Time-series,3,Rolling regression
+ts_scale,Time-Series,Time-series,2,Time-series scale
+ts_skewness,Time-Series,Time-series,2,Rolling skewness
+ts_std,Time-Series,Time-series,1,Rolling standard deviation
+ts_step,Time-Series,Time-series,2,Step function
+ts_sum,Time-Series,Time-series,1,Rolling sum
+ts_zscore,Time-Series,Time-series,2,Rolling z-score
+vec_avg,Vector,Cross-sectional,1,Average of vector
+vec_count,Vector,Cross-sectional,1,Count of vector elements
+vec_norm,Vector,Cross-sectional,1,Norm of vector
+vec_sum,Vector,Cross-sectional,1,Sum of vector
+winsorize,Data Quality,Cross-sectional,1,Winsorize outliers
+zscore,Statistical,Cross-sectional,1,Cross-sectional z-score