docs: update OTLP tracing examples

[houyuwushang]

Description

Related to #381.

This updates the tracing docs and examples to match the current OTLP exporter behavior. Trickster currently uses OTLP over HTTP (otlptracehttp), but several examples still pointed at Jaeger's legacy collector/agent endpoints (14268/api/traces, 6831) or old provider: jaeger options.

This PR:

• points Jaeger OTLP examples at http://...:4318/v1/traces
• exposes Jaeger's OTLP HTTP port (4318) in the docker-compose demo/dev services
• removes old Jaeger agent/provider config snippets from the Kubernetes example
• updates docs/tracing.md to link to the current example config instead of the old v1.1.2 example

No runtime behavior changes are intended.

Validation:

• rg -n "provider:\s*jaeger|jaeger\.endpoint_type|jaeger:6831|127\.0\.0\.1:6831|14268/api/traces|jaeger agent|jager agent|otlp agent backend|endpoint_type|jc1|ja1|blob/v1\.1\.2/examples/conf/example\.full\.yaml" docs examples deploy README.md pkg -g "*.md" -g "*.yaml" -g "*.yml" -g "*.go" returns no stale Trickster tracing examples
• go run ./cmd/trickster -validate-config -config examples\docker-compose\docker-compose-data\trickster-config\trickster.yaml
• go run ./cmd/trickster -validate-config -config docs\developer\environment\trickster-config\trickster.yaml
• go test ./pkg/observability/tracing/... -count=1
• git diff --check

Not run locally:

• docker compose config, because Docker CLI is not installed in my local environment.

Type of Change

• • Bug fix
• • New feature
• • Optimization
• • Test coverage
• • Documentation
• • Infrastructure

AI Disclosure

• • This contribution DOES NOT include AI-generated changes
• • This contribution DOES include AI-generated changes, and I have reviewed the relevant contributing guidelines.

[jranson]

is 14268 port mapping still needed? would be a good idea to git grep 14268 from the project root to identify all remaining usage and address any other holdovers.

[houyuwushang]

Done. I removed the remaining 14268:14268 mappings from both compose files because Trickster no longer references that endpoint in these examples.

I also reran git grep 14268 from the project root and it now returns no matches.

Validation after the update:

• git grep -n 14268 returns no matches
• go run ./cmd/trickster -validate-config -config examples\docker-compose\docker-compose-data\trickster-config\trickster.yaml
• go run ./cmd/trickster -validate-config -config docs\developer\environment\trickster-config\trickster.yaml
• go test ./pkg/observability/tracing/... -count=1
• git diff --check