* update tracing config definitions
* new tracing system
* performance improvements
* only configure tracing in envoy if it is enabled in pomerium
* [tracing] refactor to use custom extension for trace id editing (#5420)
refactor to use custom extension for trace id editing
* set default tracing sample rate to 1.0
* fix proxy service http middleware
* improve some existing auth related traces
* test fixes
* bump envoyproxy/go-control-plane
* code cleanup
* test fixes
* Fix missing spans for well-known endpoints
* import extension apis from pomerium/envoy-custom
This also replaces instances where we manually write "return ctx.Err()"
with "return context.Cause(ctx)" which is functionally identical, but
will also correctly propagate cause errors if present.
Commit b7896b3153 moved events.go from the 'authenticate' package to
'internal/authenticateflow' in order to avoid an import cycle. However
this location is not actually suitable, as the hosted authenticate
service refers to AuthEvent and AuthEventFn.
Move events.go back out from under 'internal', to a new package
'authenticate/events'. This should still avoid an import cycle between
'authenticate' and 'internal/authenticateflow', while also allowing the
hosted authenticate service to use the events types.
Move the Stateless.logAuthenticateEvent() method into the main
stateless.go file.
(This was in events.go temporarily so that Git would track the file
history as a rename from authenticate/events.go.)
Consolidate all logic specific to the stateless authenticate flow into a
a new Stateless type in a new package internal/authenticateflow. This is
in preparation for adding a new Stateful type implementing the older
stateful authenticate flow (from Pomerium v0.20 and previous).
This change is intended as a pure refactoring of existing logic, with no
changes in functionality.
