Tesoro fails to reveal references that are inside a file

[ademariag]

Describe the bug/feature
Tesoro fails to detect and reveal secrets embedded into other strings

kind: Secret
metadata:
  labels:
    name: bug-report
    tesoro.kapicorp.com: enabled
  name: bug-report
stringData:
  not_work: does not work ?{base64:eyJkYXRhIjogIk4wOTRlbE5XTlZWalFVZzRWblJKVTBscVpWWXpTVkZYV2pGWFVVOVViV1JSWlRFeFFYWlNhbVJuU1E9PSIsICJlbmNvZGluZyI6ICJvcmlnaW5hbCIsICJ0eXBlIjogImJhc2U2NCJ9:embedded}
  works: ?{base64:eyJkYXRhIjogIk4wOTRlbE5XTlZWalFVZzRWblJKVTBscVpWWXpTVkZYV2pGWFVVOVViV1JSWlRFeFFYWlNhbVJuU1E9PSIsICJlbmNvZGluZyI6ICJvcmlnaW5hbCIsICJ0eXBlIjogImJhc2U2NCJ9:embedded}

results in:

{
  "not_work": "ZG9lcyBub3Qgd29yayA/e2Jhc2U2NDpleUprWVhSaElqb2dJazR3T1RSbGJFNVhUbFpXYWxGVlp6UldibEpLVlRCc2NWcFdXWHBUVmtaWVYycEdXRlZWT1ZWaVYxSlNXbFJGZUZGWVdsTmhiVkp1VTFFOVBTSXNJQ0psYm1OdlpHbHVaeUk2SUNKdmNtbG5hVzVoYkNJc0lDSjBlWEJsSWpvZ0ltSmhjMlUyTkNKOTplbWJlZGRlZH0=",
  "works": "N094elNWNVVjQUg4VnRJU0lqZVYzSVFXWjFXUU9UbWRRZTExQXZSamRnSQ=="
}

with annotations

k get secret/bug-report -o yaml | yq -r .metadata.annotations.'"tesoro.kapicorp.com/revealed"'
["/data/works"]