feat: trace data indicators, inline tap config, and detail tab gating

Trace data visibility:
- ProcessorNode now includes hasTraceData flag computed from captured
  body/headers during tree conversion
- ConfigBadge shows teal for tracing configured, green when data captured
- Search results show green footprints icon for exchanges with trace data
- New has_trace_data column on executions table (V11 migration with backfill)
- OpenSearch documents and ExecutionSummary include the flag

Inline tap configuration:
- Extracted reusable TapConfigModal component from RouteDetail
- Diagram context menu opens tap modal inline instead of navigating away
- Toggle-trace action works immediately with toast feedback
- Modal closes only on ESC, Cancel, Save, or Delete (not backdrop click)

Detail panel tab gating:
- Headers, Input, Output tabs disabled when no data is available
- Works at both exchange and processor level
- Falls back to Info tab when active tab becomes empty

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

cameleer3-server-app/src/main/resources/db/migration/V11__has_trace_data.sql

@@ -0,0 +1,10 @@
+-- Flag indicating whether any processor in this execution captured trace data
+ALTER TABLE executions ADD COLUMN IF NOT EXISTS has_trace_data BOOLEAN NOT NULL DEFAULT FALSE;
+
+-- Backfill: set flag for existing executions that have processor trace data
+UPDATE executions e SET has_trace_data = TRUE
+WHERE EXISTS (
+    SELECT 1 FROM processor_executions pe
+    WHERE pe.execution_id = e.execution_id
+      AND (pe.input_body IS NOT NULL OR pe.output_body IS NOT NULL)
+);