Module utils 

Functions

format_expression

Format an Expression as a human-readable string

number_from_f64

Convert f64 to serde_json::Number, returning 0 for NaN/Infinity instead of panicking

parse_datetime

Parse a date value (timestamp or ISO string) into DateTime

safe_regex

Create a regex with safety limits to prevent ReDoS attacks. While the Rust regex crate is inherently ReDoS-resistant (uses Thompson NFA), we still limit pattern size and compiled size to prevent memory exhaustion.