Fix core_adapter select_edge to use actual context for edge conditions

The select_edge bridge was creating an empty Context, which meant edge
conditions reading context values (e.g. context.failure_class=budget_exhausted)
would never match when using the core engine. Now snapshots the CoreContext
into a wf Context so evaluate_condition sees the real runtime state.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

lib/crates/fabro-workflows/src/context/mod.rs

@@ -118,6 +118,13 @@ impl Context {
 
     // --- Internal accessors for bridge code ---
 
+    pub(crate) fn from_values(values: HashMap<String, Value>) -> Self {
+        Self {
+            values: Arc::new(RwLock::new(values)),
+            logs: Arc::new(RwLock::new(Vec::new())),
+        }
+    }
+
     pub(crate) fn values_arc(&self) -> Arc<RwLock<HashMap<String, Value>>> {
         self.values.clone()
     }

lib/crates/fabro-workflows/src/core_adapter/graph.rs

@@ -101,10 +101,12 @@ impl Graph for WorkflowGraph {
         &self,
         node: &Self::Node,
         outcome: &Outcome,
-        _context: &CoreContext,
+        context: &CoreContext,
     ) -> Option<EdgeSelection<Self>> {
-        // Outcome is now the wf type directly — no conversion needed
-        let wf_context = crate::context::Context::new();
+        // Build a wf Context from the core context snapshot so edge conditions
+        // that read context values (e.g. `context.failure_class=budget_exhausted`)
+        // evaluate correctly.
+        let wf_context = crate::context::Context::from_values(context.snapshot());
         let selection = engine::select_edge(
             node.inner(),
             outcome,