feat(intern-decision): stack, DNS and GPU 3 acceptance for the SemIf replacement

stacks/intern-decision: compose (GPU 1, :8033, hard VRAM cap as the single .env knob,
healthcheck, Homepage group 'AI - Eval & Retrieval'), .env.example and README.
dns: intern-decision.fv.internal -> fv-ml1 (synced to ana/esh/nh3).
acceptance on fv-ml1 GPU 3, 3 fresh processes: bit-identical to the Jev bench's native rows
(pooled 240/259, Wyrd 79/84, 0/560 flips, Δp 0), negative control 10/122/14, 0 flips across
restarts; largest accepted request 200 at a 10,134 MiB card peak under a 9.25 GiB cap; 503 and
recovery proven at a tight cap. GPU 1 deploy held: nvidia-smi Free on GPU 1 is 15,442 MiB.

dns/internal.yaml

@@ -127,4 +127,5 @@ aliases:
   - {name: wherethef, site: nh3, target: nh3-dev,    note: WhereTF :8093}
   - {name: homepage,  site: esh, target: esh-docker-vm, note: fleet dashboard :5100}
   - {name: scriberr,  site: fv,  target: fv-ml1,      note: transcription + diarization :8080 (GPU1)}
-  - {name: semif,     site: fv,  target: fv-ml1,      note: SemIf option-logit decisions :8032 (GPU1)}
+  - {name: semif,     site: fv,  target: fv-ml1,      note: SemIf option-logit decisions :8032 (GPU1) — stopped since 2026-09-30, being replaced by intern-decision (Prime); kept as rollback}
+  - {name: intern-decision, site: fv, target: fv-ml1, note: Intern-Decision-4B typed decisions :8033 (GPU1), semif-serve API; replaces semif (Prime 2026-09-30)}