Adds an optional "Name (SI)" column that parses numeric values with SI
prefixes (p, n, u/µ, m, k/K, M, G, T) from part names and sorts by the
resulting physical value. This is useful for electronic components where
alphabetical sorting produces wrong results — e.g. 100nF, 10pF, 1uF
should sort as 10pF < 100nF < 1uF.
Implementation:
- New SiValueSort DQL function with platform-specific SQL generation
for PostgreSQL (POSIX regex), MySQL/MariaDB (REGEXP_SUBSTR), and
SQLite (PHP callback registered via the existing middleware).
- The regex is start-anchored: only names beginning with a number are
matched. Part numbers like "MCP2515" or "Crystal 20MHz" are ignored.
- When SI sort is active, NATSORT is appended as a secondary sort so
that non-matching parts fall back to natural string ordering instead
of appearing in arbitrary order.
- The column is opt-in (not in default columns) and displays the parsed
float value, or an empty cell for non-matching names.
