- Format.number/1: boundary cases (0, 999, 1_000), float rounding,
nil/atom fallback to to_string, plus two properties — comma
insertion is lossless round-trip and the comma count follows
`div(digits - 1, 3)` for |n| ≥ 1000.
- Format.bytes/1: per-unit boundary cases plus a monotonicity
property (parse-back preserves ordering across the B/KB/MB/GB
transitions).
- Instrument.span/2,3 (0→100%): wraps the block in a telemetry span
returning its value, defaults metadata to %{}, emits the
:exception event and re-raises on a raise inside the span, and
prefixes every event suffix with :microwaveprop.
- SolarClient: short-line / empty-line / blank-day handling for
parse_gfz_row; blank-line + short-line tolerance in parse_gfz_file;
filter_since boundary semantics (>= is inclusive, empty list
passes through).
Suite: 2,397 tests + 159 properties (was 2,382 + 155); coverage
71.12% → 71.16%; Format + Instrument now at 100%; credo strict clean.
