feat: amber container for filter/idempotent gate state + red pulse on failed badge

When a filter processor rejects a message (filterMatched=false) or an
idempotent consumer detects a duplicate (duplicateMessage=true), the
compound container turns amber (header, border, body tint).

Also adds red pulsing rings on the failed processor badge (same SMIL
pattern as the teal hasTraceData pulse).

Backend: ProcessorNode gains filterMatched/duplicateMessage fields,
threaded from ProcessorExecution JSON path.

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

ui/src/components/ExecutionDiagram/types.ts

@@ -12,6 +12,10 @@ export interface NodeExecutionState {
   hasTraceData?: boolean;
   /** Runtime-resolved endpoint URI (for TO_DYNAMIC, etc.) */
   resolvedEndpointUri?: string;
+  /** Filter processor: true if predicate matched, false if message was rejected */
+  filterMatched?: boolean;
+  /** Idempotent consumer: true if duplicate message detected and children skipped */
+  duplicateMessage?: boolean;
 }
 
 export interface IterationInfo {

ui/src/components/ExecutionDiagram/useExecutionOverlay.ts

@@ -61,6 +61,8 @@ function buildOverlay(
       subRouteFailed: subRouteFailed || undefined,
       hasTraceData: !!proc.hasTraceData,
       resolvedEndpointUri: proc.resolvedEndpointUri || undefined,
+      filterMatched: (proc as Record<string, unknown>).filterMatched as boolean | undefined,
+      duplicateMessage: (proc as Record<string, unknown>).duplicateMessage as boolean | undefined,
     });
 
     // Recurse into children