vgsp-gr: retirement wait - correct footprint (exclude launch pages) + adaptive exits

- Footprint: exclude data entries whose guest VA is a forwarded launch page
  (qmd_word pages) before picking out_base/out_pages. The fill relocates the
  launch's own param/bank pages as high-VA candidates, which made out_pages
  the whole 205-page budget and forced the full 1.5 s wait on every launch
  (r147: '64/205 pages changed ... (TIMEOUT)' on green matmul).
- Adaptive exits: no writes at all after 60 ms (identical-rewrite benchmark
  launches / no-output footprints) or a partial count settled for 3 polls
  (masked kernels) end the wait early; genuinely late writes are still
  caught. Log now carries the reason suffix (no suffix = full footprint).

Live evidence from r147 with the first cut: the exact failing order
mail->matmul->smiley ran green->green->green (smiley recovered to 32/205
changed, C window written; earlier boots showed 0-8 changed and STATUS
FAIL). victory_math/vector_add still fail on the >256 KB per-operand
window cap (chunked data path is the next wall, not this class).

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