frank-default-small: disable speculative decoding to keep 3 slots

ik_llama limits speculative decoding to a single server slot (-np 1) and
hard-exits at load if a spec stage is configured with --parallel > 1:
"Speculative decoding is currently limited to a single server slot
(-np 1)." This service keeps PARALLEL=3 (one slot per user), so set
SPEC_TYPE=none to disable speculation. It is a low-parameter MoE (3B
active of 35B), so throughput is fine without it. MTP stays disabled.
KB and tests updated.

scripts/frank-default-small.env

@@ -45,14 +45,14 @@ LISTEN_PORT=7770
 CTX_SIZE=491520
 PARALLEL=3
 
-# Speculative decoding: ngram-mod only. MTP is intentionally disabled.
-# ik_llama main uses canonical --spec-type ngram-mod:KEY=VAL form. Legacy
-# --spec-ngram-mod-n-min/max/match are rejected. Mapping from the old config:
-#   old --spec-ngram-mod-n-min  (48) -> n_min
-#   old --spec-ngram-mod-n-max  (64) -> n_max
-#   old --spec-ngram-mod-n-match (24 -> ngram lookup length) -> ngram_size_n
-# SPEC_TYPE is passed through to --spec-type.
-SPEC_TYPE=ngram-mod:n_min=48,n_max=64,ngram_size_n=24
+# Speculative decoding: DISABLED. ik_llama limits speculative decoding
+# (ngram-mod / MTP / etc.) to a single server slot (-np 1) and hard-exits if
+# --parallel > 1 with a spec stage configured ("Speculative decoding is
+# currently limited to a single server slot (-np 1)."). This service keeps
+# 3 parallel slots (one per user), so SPEC_TYPE is disabled (none). It is a
+# low-parameter MoE (3B active of 35B), so throughput is fine without
+# speculation. MTP is also intentionally disabled.
+SPEC_TYPE=none
 
 # Expert offload via explicit tensor override (replaces --n-cpu-moe). The Q6_K
 # layer audit found 630 MiB of expert tensors per block. Keep every