docs: correct sec-seat lineage — M.O.G.-SEC/mog-sec is an offense+defense SFT finetune, not a persona-on-stock

The sentinel-r3 header and two memory notes described mog-sec (Blackfrost
M.O.G.-SEC / Qwentium) as 'a persona system prompt on stock weights'. Its card
is explicit that it is NOT: base_model_relation: finetune on Qwen/Qwen3.8-27B,
a refusal-free offense+defense cybersecurity SFT with YaRN 1M context ('not a
system-prompt sticker on a stock Qwen'). So all three sec-seat candidates are
Qwen3.8-27B SFT finetunes and differ in training focus, not in kind:
mog-sec = broad offense+defense SFT; sentinel-r3 = pentest agent-trajectory SFT;
cyberprev = cyber tool-calling LoRA SFT on an abliterated base.

persistent-memory.d/2026-09-14-fv-seat-reorg-and-orca-blocker.md

@@ -30,7 +30,9 @@ here is on the running box; regenerate the authoritative view with
    (:8021, the 26B MoE) is the deliberate speed tier — the throughput answer, so
    char-rp stays the quality seat. `stacks/meromero-charrp/`.
 4. **Sentinel-R3 A/B + dflash.** `glyphsoftware/sentinel-r3` (proprietary license —
-   operator's call) is a REAL SFT pentest finetune vs mog-sec's persona-on-stock.
+   operator's call) is a REAL SFT pentest finetune vs mog-sec (M.O.G.-SEC), which is
+   ALSO a finetune — a refusal-free offense+defense cyber SFT, NOT a persona-on-stock as
+   earlier notes claimed. All three sec seats are Qwen3.8-27B finetunes; they differ in focus.
    Served alongside mog-sec for A/B. Then measured dflash vs MTP on Sentinel's
    finetuned body: **dflash 2.40 vs MTP 2.18 mean acceptance length (+11%)**, warm
    decode ~121 tok/s (faster than sec ~102). dflash k=7 cut over. `stacks/sentinel-r3/`.