fix(semif): 0.1.4 — object states ending in ) ; } no longer 422 (INV-7)

SemIf's shared scorer trims one token at the state boundary. When an object
state's last value ends in ')', ';' or '}', the JSON that follows re-merges two
tokens back, so score_shared refused the request with 422. The engine now wraps
semif_phase1.shared._state_prefix to keep only the tokens the full prompts
share. Each row scores the same token sequence; only the prefill/suffix split
moves.

Startup proves the fix is in effect, not just installed (heid bug hunt SKAL,
folded). It checks that the hook is callable and is what score_shared resolves,
that an ordinary state keeps upstream's whole prefix, and that a merge-prone
state scores through the shared path.

Real tokenizer: 154 states, 23 refused before and 0 after, with no ordinary or
authored144 prefix changed. Acceptance: 144/144 parity. Shared vs direct 71/72;
the miss is a bf16 tie that flipped across a plain restart (see README).

stacks/semif/.env.example

@@ -1,6 +1,6 @@
 # semif — copy to /opt/docker/compose/semif/.env on fv-ml1 (mode 0600).
 # Built on fv-ml1 from services/semif-serve (see README "Building").
-IMAGE=semif-serve:0.1.3
+IMAGE=semif-serve:0.1.4
 PORT=8032
 HOST_IP=10.251.50.54
 # fv-ml1 GPU 1 = the utility card (vllm-coder, erp, meromero, scriberr).