Extends tracing to every remaining module: all 23 API route handlers,
correlation engine, sniffer (fingerprint/p0f/syslog), prober (jarm/hassh/tcpfp),
profiler behavioral analysis, logging subsystem, engine, and mutator.
Bridges the ingester→SSE trace gap by persisting trace_id/span_id columns on
the logs table and creating OTEL span links in the SSE endpoint. Adds log-trace
correlation via _TraceContextFilter injecting otel_trace_id into Python LogRecords.
Includes development/docs/TRACING.md with full span reference (76 spans),
pipeline propagation architecture, quick start guide, and troubleshooting.
dict[str, Any] and X | Y union syntax require Python 3.10+. Containers
running centos7/ubuntu20/rocky9 base images ship Python 3.6-3.9 and
crashed on import. Adding the __future__ import makes all annotations
lazy strings, compatible back to Python 3.7.
Affected: templates/decnet_logging.py (+ all 22 template copies),
decnet/logging/syslog_formatter.py, decnet/logging/file_handler.py
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
