r596 diag: print the raw-prelude geometry the verbatim gate tests (bounded)

The r595 A/B could not be judged from the log: with prelude=1 the r593
boot never reached the build path (r590b deferred first) and no
geometry line existed. Print raw presence/raw_words/hdr/end/want_end for
the first eight prelude-gated launches so the gate is verifiable.

r599 measurement: raw=1 raw_words=210 hdr=138 end=205 want_end=205 -
the gate IS met; the verbatim prelude is replayed (words=205) but the
launch then completes with qmd_rel=0x00000000 after an 8.9 s stall
(engine never ran; software release), so prelude=1 breaks the launch.

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