Add TracingProcessor export to __init__.py

Author: vincenzodomina

src/agents/__init__.py

@@ -73,6 +73,7 @@
     SpanData,
     SpanError,
     Trace,
+    TracingProcessor,
     add_trace_processor,
     agent_span,
     custom_span,
@@ -208,6 +209,7 @@ def enable_verbose_stdout_logging():
     "set_tracing_disabled",
     "trace",
     "Trace",
+    "TracingProcessor",
     "SpanError",
     "Span",
     "SpanData",