When offset>0 the wrapper added an outer LIMIT N, so run_controlled's
_inject_limit bailed (a LIMIT IS present) and truncated was always False —
AGGrid could never detect more rows. Fix: for offset>0 probe with LIMIT (N+1)
OFFSET M, then compute truncated = len(rows) > N in do_run and slice back to N.
offset==0 path unchanged (delegates to extracted _run_transport helper). JSON
still reports the user's requested limit N and correct truncated. Adds 3 tests
exercising the real do_run offset>0 path (N+1 -> truncated True, N -> False,
offset==0 verbatim). 222/222 passing.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
marcopanandClaude Opus 4.8
85e2fdc00a