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feat(otel): LoggerProvider so Boar logs reach Loki (#1529) - #1544
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…1529) Wire OTLP logs beside traces/metrics (same gap class as OpenLIT-without-logs) and record lab E2E proof via Grafana Loki query_range.
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Summary
LoggerProvider+BatchLogRecordProcessor+OTLPLogExporterincore/otel_setup.py, same endpoint/insecure policy as traces/metrics.opentelemetry.instrumentation.logging.LoggingHandler(extra[otel]dep); emitboar_fast_filterstatus line after setup.otlpreceiver →otlp_http/logs); no currentsend_failedon that path.docs/ops/evidence/otel_1529_loggerprovider_loki_2026-08-12.json— Grafana Lokiquery_rangereturned 5 lines for markerdb1529-e2e2-1786537170withservice_name=data-boar.Closes #1529
Test plan
uv run pytest tests/test_otel_setup_1500.py -v(LoggerProvider + stdlib bridge unit coverage)./scripts/check-all.shgreen locally (pre-commit + full pytest + Bandit/Zizmor)DATA_BOAR_OTEL_ENABLED=1andOTEL_EXPORTER_OTLP_ENDPOINT=http://127.0.0.1:4317, emit unique marker logs +force_flushGET /api/datasources/proxy/uid/loki/loki/api/v1/query_rangewith{service_name="data-boar"} |= "<marker>"— matching lines in Loki (not code-only)otelcol_receiver_accepted_log_records_total{receiver="otlp"}andotelcol_exporter_sent_log_records_total{exporter="otlp_http/logs"}increased; no livesend_failedon OTLP logs path