Always configure OTLP from enterprise default variables and secrets (#56353)

* Always configure OTEL from enterprise default vars/secrets

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

* docs(adr): add draft ADR-56353 for always-emit OTLP from enterprise defaults

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* Address PR review: fix flaky test, dedupe OTLP env keys, close credentials leak

Co-authored-by: gh-aw-bot <259018956+gh-aw-bot@users.noreply.github.com>

* Clean up GH_AW_OTLP_ENDPOINTS in nested test afterEach for clarity

Co-authored-by: gh-aw-bot <259018956+gh-aw-bot@users.noreply.github.com>

* Update OTLP docs, enterprise-controls reference, and spec for centralized guard + env dedup

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

* Merge origin/main and regenerate lock files

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

* Fix duplicate keys in actions-lock.json from merge/recompile

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

* Merge origin/main (further commits) and regenerate lock files

Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: pelikhan <4175913+pelikhan@users.noreply.github.com>
Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-authored-by: gh-aw-bot <259018956+gh-aw-bot@users.noreply.github.com>