Fix test suite: guard OTEL init and refresh stale assertions
Calling @adonisjs/otel's init() unconditionally registered
import-in-the-middle ESM loader hooks even when OTEL was disabled,
which broke Japa's session/CSRF test plumbing (token ↔ secret mismatch
caused every authed request to 302 back). Gate init on
OTEL_EXPORTER_OTLP_ENDPOINT so tests and local runs skip it.
Also refresh two stale assertions: the OAuth scope switched to
"atproto transition:generic" in 482ddf3, and the 404 page copy changed
from "can't find" to "couldn't find" in 1eba48e.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>