* test(flow): wait for async source-table mirrors before FLUSH_FLOW
Streaming flows execute inline in the flownode insert handler since
#8976, and source-table inserts are mirrored from the frontend as
detached tasks. Tests that INSERT then ADMIN FLUSH_FLOW then SELECT
intermittently miss rows on slow CI runners because the flush no longer
implies the mirror reached the flownode (flow_no_aggr lost row 'l',
flow_advance_ttl lost row '23' after the post-restart reinsert).
Add SQLNESS SLEEP 3s between those mirror inserts and the flush, the
established pattern in the flow suite, so the assertions are stable.
Signed-off-by: discord9 <55937128+discord9@users.noreply.github.com>
* test(flow): also guard first-section flushes in flow_advance_ttl
Local reproduction without sleeps failed in a window the previous
commit did not cover: the first INSERT (20,20,22) of each section is
followed immediately by ADMIN FLUSH_FLOW, and the distributed run
observed an empty sink on that SELECT (~1 in 8 iterations). Add the
same SLEEP 3s guard before those two flushes.
Signed-off-by: discord9 <55937128+discord9@users.noreply.github.com>
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Signed-off-by: discord9 <55937128+discord9@users.noreply.github.com>