test(#33): use a valid-format wallet probe so the tier-4 gate exercises the approval gate

The hardening wallet round-trip used a 96-char probe containing '0' (invalid
base58) — monero_address_type is format-only (starts-with-4 + length 95), so an
invalid probe is rejected at PREVIEW by config validation, before the approval
gate it's meant to test. The determinism fix then asserted the preview STAGED
(previewed), which failed. Use a valid-format 95-char probe: the preview now
stages (previewed) and the default-deny gate refuses it at COMMIT (rejected),
with the .env-untouched assertion catching any gate failure loudly. Test-only.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: VijitSingh97

tests/integration/run.sh

@@ -1330,7 +1330,7 @@ run_hardening() {
         local uuid_bad bad_cfg wallet_before
         uuid_bad="$(_uuid4)"
         wallet_before="$(env_on_box MONERO_WALLET_ADDRESS)"
-        bad_cfg="$(printf '%s' "$ctrl_config" | jq -c '.monero.wallet_address="4TIER4TESTWALLETdoNotApplyThisIsAnIntegrationTestRejectionProbe0000000000000000000000000000000000"')"
+        bad_cfg="$(printf '%s' "$ctrl_config" | jq -c '.monero.wallet_address="4TESTWALLETdoNotUseHandsffGateRejectSensitiveKeyDefautDenyProbeAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"')"
         _spool_write "$cdir/requests/$uuid_bad.json" \
             "$(jq -nc --argjson c "$bad_cfg" --arg id "$uuid_bad" '{id:$id,action:"preview",actor:"itest",config:$c}')"
         st="$(_wait_control_status "$cdir" "$uuid_bad" "" 60 || echo timeout)"