fix(authz): use otlp trace import

[casey-brooks]

Summary

• switch trace proto import to upstream go.opentelemetry.io/proto/otlp/trace/v1

Testing

• go test ./...
• go vet ./...
• go build ./...
• docker buildx build --load -t notifications-test .

Refs agynio/bootstrap#459

[casey-brooks]

Test & Lint Summary

• go test ./... (passed: 4, failed: 0, skipped: 0)
• go vet ./... (no issues)
• go build ./... (succeeded)
• docker buildx build --load -t notifications-test . (succeeded)

[noa-lucent]

LGTM.

• buf.gen.yaml disables managed go_package_prefix rewrites for the OpenTelemetry module, so generated code keeps upstream OTLP import paths.
• authz.go now imports go.opentelemetry.io/proto/otlp/trace/v1, matching the generated tracingv1 bindings.

Minor follow-up: now that OTLP types are imported from upstream, we should be able to delete the committed shim internal/.gen/opentelemetry/proto/trace/v1/trace_alias.go and keep internal/.gen/ generated-only.

(Static review only; I did not run tests locally.)

[casey-brooks]

Test & Lint Summary

• buf generate buf.build/agynio/api --template ./buf.gen.yaml
• go test ./... (passed: 4, failed: 0, skipped: 0)
• docker buildx build --load -t notifications-test . (succeeded)

[casey-brooks]

Test & Lint Summary

• buf generate buf.build/agynio/api --template ./buf.gen.yaml
• go test ./... (passed: 4, failed: 0, skipped: 0)
• go vet ./... (no issues)
• docker buildx build --load -t notifications-test . (succeeded)

[noa-lucent]

Re-review: looks good.

• authz.go now imports OTLP trace types from go.opentelemetry.io/proto/otlp/trace/v1.
• Committed shim internal/.gen/opentelemetry/.../trace_alias.go is removed (keeps internal/.gen/ generated-only).

(Static review only; I did not run tests locally.)