- getE2Info: collapse the obfuscated `if (cond) {} else { body }` chain into
straight positive-form ifs; drop the redundant re-init of pair_line_info.
- getUserInfo: same de-obfuscation of the ISP block, and fix the same
"Undefined array key isp_asn" bug already fixed in getStreamingUserInfo — the
ISP-persist step ran even on a GeoIP miss (con_isp_name null), reading the
undefined isp_asn key and writing a null isp_desc/as_number to the line.
- Extract the persist predicate both methods shared into a pure, tested
UserRepository::ispChanged() helper (+ tests/Unit/UserRepositoryTest.php).
Verified: php -l, phpunit (423 tests, 944 assertions), make gates.
