⬆️ version bump to v4.5

- Update obioptions.Version from "Release 4.4.29" to "/v/ Release v5"
- Update version.txt from 4.29 → .30
(automated by Makefile)

autodoc/docmd/pkg/obistats/scaler.md

@@ -0,0 +1,23 @@
+# `obistats` Package: Semantic Description
+
+The `obistats` package provides utility functions for **formatting and scaling benchmark measurements** in Go, especially tailored for performance benchmarks (e.g., `go test -bench`). Its core component is the **`Scaler` type**, a function that converts raw numeric values into human-readable, unit-aware strings.
+
+- **`Scaler func(float64) string`**: A function type that formats a numeric measurement (e.g., time, memory usage, throughput) into an appropriately scaled and unit-annotated string.
+
+- **`NewScaler(val float64, unit string) Scaler`**: Dynamically selects the best scaling strategy based on:
+  - The measurement value (`val`)
+  - Its unit (e.g., `"ns/op"`, `"MB/s"`, `"B/op"`)
+
+  It applies **SI prefixes** (`k`/`M`/`G`/`T`) with adaptive precision (0–2 decimal places) to ensure readability and consistency across table rows.
+
+- **`timeScaler(ns float64)`**: Specialized scaler for time-based units (`ns/op`, `ns/GC`). It selects optimal unit (s, ms, µs, ns) and precision based on magnitude.
+
+- **`hasBaseUnit(s, unit string) bool`**: Helper to detect if a full unit string (e.g., `"bytes/op"`, `"MB/s"`) includes or matches a base unit.
+
+Key features:
+- Supports common Go benchmark units: time (`ns/op`), memory (`B/op`, `bytes/op`), throughput (`MB/s`)
+- Ensures consistent formatting across rows (e.g., all values in a row use same scale)
+- Avoids unnecessary trailing zeros and uses SI conventions
+- Designed for compatibility with internal benchmarking infrastructure (originally from `golang-design/bench`)
+
+Intended use: formatting tables of benchmark results where readability and unit consistency are critical.