Created a separate package for tracing-related stuff

Added mirroring of spans into Sentry
Tracer is a facade that redirects actions to tracing backends

cmapi/tracing/traceparent_backend.py

@@ -0,0 +1,38 @@
+import logging
+import time
+from typing import Any, Dict, Optional
+
+from tracing.tracer import TracerBackend, TraceSpan
+from tracing.utils import swallow_exceptions
+
+logger = logging.getLogger(__name__)
+
+
+class TraceparentBackend(TracerBackend):
+    """Default backend that logs span lifecycle and mirrors events/status."""
+
+    @swallow_exceptions
+    def on_span_start(self, span: TraceSpan) -> None:
+        logger.info(
+            "span_begin name=%s kind=%s trace_id=%s span_id=%s parent=%s attrs=%s",
+            span.name, span.kind, span.trace_id, span.span_id,
+            span.parent_span_id, span.attributes,
+        )
+
+    @swallow_exceptions
+    def on_span_end(self, span: TraceSpan, exc: Optional[BaseException]) -> None:
+        duration_ms = (time.time_ns() - span.start_ns) / 1_000_000
+        logger.info(
+            "span_end name=%s kind=%s trace_id=%s span_id=%s parent=%s duration_ms=%.3f attrs=%s",
+            span.name, span.kind, span.trace_id, span.span_id,
+            span.parent_span_id, duration_ms, span.attributes,
+        )
+
+    @swallow_exceptions
+    def on_span_event(self, span: TraceSpan, name: str, attrs: Dict[str, Any]) -> None:
+        logger.info(
+            "span_event name=%s trace_id=%s span_id=%s attrs=%s",
+            name, span.trace_id, span.span_id, attrs,
+        )
+
+