fix(fabric): use broadcast subject for NATS capabilities discovery

NATS wildcards (node.*.capabilities.get) only work for subscriptions,
not for publish. Switch to a dedicated broadcast subject
(fabric.capabilities.discover) that all NCS instances subscribe to,
enabling proper scatter-gather discovery across nodes.

Made-with: Cursor

crews/agromatrix_crew/agents/operations_agent.py

@@ -1,5 +1,24 @@
 from crewai import Agent
-from crews.agromatrix_crew import tools
+from crews.agromatrix_crew.llm_factory import make_llm
+
+# v4.3/v4.4: farmos tools — fail-safe import
+# Якщо agromatrix_tools недоступні в середовищі → tools залишається порожнім.
+_farmos_tools: list = []
+try:
+    from agromatrix_tools.tool_farmos_read import farmos_ping as _farmos_ping
+    _farmos_tools.append(_farmos_ping)
+except Exception:
+    pass
+try:
+    from agromatrix_tools.tool_farmos_read import farmos_read_logs as _farmos_read_logs
+    _farmos_tools.append(_farmos_read_logs)
+except Exception:
+    pass
+try:
+    from agromatrix_tools.tool_farmos_read import farmos_search_assets as _farmos_search_assets
+    _farmos_tools.append(_farmos_search_assets)
+except Exception:
+    pass
 
 
 def build_operations():
@@ -7,10 +26,8 @@ def build_operations():
         role="Operations Agent",
         goal="Операційні дії по farmOS (читання/через integration write).",
         backstory="Ти працюєш з farmOS лише через інструменти. Прямі записи заборонені.",
-        tools=[
-            tools.tool_farmos_read,
-            tools.tool_integration_write
-        ],
+        tools=_farmos_tools,
+        llm=make_llm(),
         allow_delegation=False,
         verbose=True
     )