feat: consult Approvisionnement before dropping a reference

Closes the last item on this agent's backlog. A reference about to be reordered
is not a reference to discontinue, and the catalog's own quantity field does not
say whether it is — that is the supply agent's decision, and it answers rather
than handing back its stock table.

One narrow tool, not a generic call_agent(name, text): a generic one lets the
model reach any peer with any prompt, which is how an agent becomes a proxy onto
its neighbours. The peer's token is minted per call for that peer alone, so an
injection that talks this agent into consulting the wrong one fails at the
realm.

A peer ending in any state but completed is reported as such, never smoothed
over: a specialist that escalated has not answered, and presenting its
escalation as an answer is how a refusal turns into a fact.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

k8s/deployment.yaml

@@ -30,7 +30,7 @@ spec:
           # repo is public, so the pull needs no credentials — which removes an
           # imagePullSecret that would otherwise have to be created by hand in
           # this namespace and kept in step with a GitHub token.
-          image: gitea.sttlab.eu/stt/classic-models-agent-catalogue:v0.2.0
+          image: gitea.sttlab.eu/stt/classic-models-agent-catalogue:v0.3.0
           ports:
             - name: http
               containerPort: 8080