* fix(status): render sub-1000 token counts as plain integers
formatKTokens always divided by 1000 and appended "k", so token counts
below 1000 rendered as misleading fractional k in `openclaw status`
output (e.g. 999 rounded up across the boundary to "1.0k", 420 -> "0.4k",
a 300-token cache write -> "write 0.3k").
Guard value < 1000 to render the plain rounded integer, matching the
canonical formatTokenCount convention (src/utils/usage-format.ts). The
>=1000 "k" behavior is unchanged. Adds focused regression tests for the
0/420/999/1000/12000 boundary and small-session/small-cache status lines.
Fixes#89735
* fix(status): reuse canonical token formatter
* refactor(status): extract lightweight token formatter
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Co-authored-by: Vincent Koc <25068+vincentkoc@users.noreply.github.com>
e8b35a8280