* perf(telemetry): lazy-load the SDK and split OTLP exporter chains by protocol
* fix(telemetry): close lazy SDK init/shutdown races and make load failure non-fatal
Addresses PR #7276 review feedback: shutdown now awaits an in-flight init before tearing down (was racing past the sync flag and leaking a started SDK whose buffered spans/logs never flushed); the dynamic imports now sit inside init's try so a chunk-load failure degrades telemetry instead of aborting daemon runtime startup. Also breaks the sdk<->sdk-impl import cycle via a leaf otlp-urls module, hardens the sdk-node exporter stub for thenable/interop probes with a unit-tested separator-independent resolve, lists the HTTP exporter packages explicitly in the bundle guard, and adds lazy-init lifecycle tests.
