v0.2.0

What's New

Added

• Vec API for labeled metrics (prometheus-cpp style)
• Direct vec operations: inc_counter_vec, get_counter_vec, inc_gauge_vec, dec_gauge_vec, set_gauge_vec, get_gauge_vec, observe_histogram_vec, get_histogram_vec
• labels/2 function to get labeled metric instances
• Prometheus text format export via instrument_prometheus:format/0
• GitHub Actions CI for OTP 27/28 on Linux and macOS
• ex_doc documentation support
• Type specs for prometheus, vector, and registry modules

Changed

• Modernized NIF code from C++ to C11 with CMake build system
• Updated README with examples and API documentation
• Updated copyright to 2017-2026

Removed

• Dead code cleanup