gitleaks: the test key's fingerprint names the first commit of this history

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

.gitleaksignore

@@ -1,4 +1,4 @@
 # A made-up Stripe-shaped key that tests/memory.test.ts feeds the memory threat scanner, which must
 # catch it. Not a credential. (gitleaks fingerprints: the commit that added it, and the file now.)
-4625d26e94f900833e053346619f2b212f6416e6:tests/memory.test.ts:stripe-access-token:95
+f9bad01ed7a06988bdd02bddaac14baad841d6d4:tests/memory.test.ts:stripe-access-token:95
 tests/memory.test.ts:stripe-access-token:95