Review profile-wallet-connect: confirm selector, fix gherkin-parser wrapper

Reviewed the refactorer's profile-wallet-connect work. getViewerAddress is a
clean pure selector (reactive-then-wallet precedence, null-on-absent); the
profile index.js wiring fix is sound and correctly re-loads when the address
becomes available. Fixed swarmforge/scripts/gherkin-parser, which delegated to
a non-existent .swarmforge/tools/aps path, to use the established tmp/aps-spec
checkout. Added the mutation differential-manifest for the new module.
Verification: 243 client unit + 33 property tests pass, lint clean,
mutation 2 killed / 0 survived, DRY no candidates, soft Gherkin mutation
6 intrinsic equivalents.

By architect.

psf-memo-client/src/services/profile-wallet.js

@@ -17,3 +17,7 @@ function getViewerAddress (appData) {
 }
 
 module.exports = { getViewerAddress }
+
+// mutate4javascript-manifest-begin
+// {"version":1,"tested_at":"2026-09-03T23:17:03.194Z","module_hash":"4ae57c493ddf87d2eed0fc3d1241829fb5a563a0dacdced4523170d7eb069640","functions":[{"id":"func/getViewerAddress","name":"getViewerAddress","line":13,"end_line":17,"hash":"5e0666eb50f9c9ad8ebd829551410179ba91b82c7f5fb862fa6e0c0613e6de47"}]}
+// mutate4javascript-manifest-end