* fix: avoid express-rate-limit v8 ERR_ERL_KEY_GEN_IPV6 false positive
express-rate-limit v8 calls keyGenerator.toString() and throws
ERR_ERL_KEY_GEN_IPV6 if the source contains the literal substring
"req.ip" without "ipKeyGenerator". When packages/api compiles
req?.ip to older JS targets, the output contains "req.ip",
triggering the heuristic.
Bracket notation (req?.['ip']) produces identical runtime behavior
but never emits the literal "req.ip" substring regardless of
compilation target.
Closes#12321
* fix: add toString regression test and clean up redundant annotation
Add a test that verifies removePorts.toString() does not contain
"req.ip", guarding against reintroduction of the ERR_ERL_KEY_GEN_IPV6
false positive. Fix a misleading test description and remove a
redundant type annotation on a trivially-inferred local.
594d9470d5