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.

services/intern-decision-serve/acceptance/gpu3-2026-09-30/overhead-uncapped/overhead.json

@@ -0,0 +1,37 @@
+[
+ {
+  "tag": "rest",
+  "card_mib": 8822,
+  "reserved_mib": 8160,
+  "outside_mib": 660,
+  "max_reserved_mib": 9074
+ },
+ {
+  "tag": "after concurrent burst 1",
+  "card_mib": 8828,
+  "reserved_mib": 8166,
+  "outside_mib": 660,
+  "max_reserved_mib": 9074
+ },
+ {
+  "tag": "after concurrent burst 2",
+  "card_mib": 8828,
+  "reserved_mib": 8166,
+  "outside_mib": 660,
+  "max_reserved_mib": 9074
+ },
+ {
+  "tag": "after latency shapes",
+  "card_mib": 8824,
+  "reserved_mib": 8160,
+  "outside_mib": 662,
+  "max_reserved_mib": 9074
+ },
+ {
+  "tag": "after largest requests",
+  "card_mib": 8830,
+  "reserved_mib": 8166,
+  "outside_mib": 662,
+  "max_reserved_mib": 9760
+ }
+]