The specs deleted a global authorizations:* pattern from the shared test Redis DB, so concurrent test processes could wipe each other's keys mid-example, causing intermittent empty/mismatched set failures. Drop all global pattern deletes and the now-unused redis_rs_delete_keys helper. Each spec now reads or asserts only the exact key derived from its own random token, so runs can no longer interfere regardless of ordering or concurrency. Also fixes a vacuous assertion in the #destroy spec, which checked authorizations:<user.address>:* (never matching the keys, which use user.cn), to assert the exact key is gone.