Replace brittle explicit method-by-method proxy with __getattr__-based
dynamic proxy that forwards all args/kwargs to the inner repo. Fixes
TypeError on get_logs_after_id() where concrete repo accepts extra
kwargs beyond the ABC signature.
Pin DECNET_DEVELOPER_TRACING=false in conftest.py so .env.local
settings don't leak into the test suite.
Gated by DECNET_DEVELOPER_TRACING env var (default off, zero overhead).
When enabled, traces flow through FastAPI routes, background workers
(collector, ingester, profiler, sniffer, prober), engine/mutator
operations, and all DB calls via TracedRepository proxy.
Includes Jaeger docker-compose for local dev and 18 unit tests.
