An already-constructed OTel Instrumentation instance — the INJECT half of the inject-or-lazy seam. When set, the registry skips the lazy npm: import and uses this instance directly.

Opaque config object forwarded VERBATIM to the OTel instrumentation constructor's config argument (the LAZY half). Framework-owned and untyped on purpose: OTel instrumentation config surfaces evolve independently and re-typing them here would fabricate field names and drift.