Add OpenTelemetry distributed tracing support#1234

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lovasoa wants to merge 38 commits intomainfrom

Commits on Mar 8, 2026

add OpenTelemetry distributed tracing support

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fix OTel example: tracing init, Dockerfile, Tempo config

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propagate trace context to PostgreSQL via application_name

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rewrite OTel example README with setup guides for all major providers

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fix todo example: use :title (POST variable) instead of $title

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set code.filepath and code.lineno span attributes to user SQL files

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npm run fix
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use stable OTel semantic convention attribute names

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use OTel semantic convention values for db.system.name

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remove json-subscriber dependency

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add Loki + Promtail log aggregation to OTel example

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add OTel spans for request parsing, rendering, sqlpage functions, and OIDC

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add oidc.jwt.verify span for OIDC token verification

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add enduser.id attribute to oidc.jwt.verify span

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add OTel user.* attributes to oidc.jwt.verify span

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add sqlpage.file.load span and attributes to http.parse_request

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Fix clippy pedantic warnings
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unify log format: logfmt with colors, no OTel noise

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use .instrument() instead of .entered() for async spans

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preserve multi-line error formatting in terminal log output

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use root Dockerfile for OTel example, add CARGO_PROFILE build arg

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Commits on Mar 9, 2026