vgsp-sema r565: session-scope the GR exactly-once caches (cross-client VA reuse)

The UVM pool reuses the same launch push VAs for every client of a boot.
svc_gr_cap_hist[8] matches on the push VA ALONE (no content hash) and was
boot-scoped, so a previous client's capture could classify a later
client's fresh launch as already captured and skip it (LAUNCH-SKIP
(replay; already captured=1) from a dead session's record). svc_gr_seen
(hash-keyed) and svc_inline_once (content-keyed) share the same lifetime
and the same class of risk.

Reset all three in svc_session_flush; they refill within the session from
the live client's own pushes, so same-session dedup is unchanged.

0 files changed, 0 insertions, 0 deletions