fix: commit the fixture packages and log that .gitignore was hiding

fixtures/packages/tiny2026tiny-j4qm/witnesses.json

@@ -0,0 +1 @@
+{"witnesses":[{"id":"nmfryke","kind":"pdf","media_type":"application/pdf","origin":{"source":"author"},"pages":1,"rights":{"asserted_by":{"by":"ana","evidence":[{"kind":"statement","note":"The team's own draft."}]},"at":"2026-09-15T12:00:00Z","basis":"own-work","format":"scienting-rights/1","license":{"spdx":"CC-BY-4.0"},"uses":{"accessible-copy":true,"ai":{"external/local":true,"external/outside":true,"external/outside-no-retention":true,"external/tenancy":true,"internal/local":true,"internal/outside":true,"internal/outside-no-retention":true,"internal/tenancy":true},"quote-public":true,"read":true,"redistribute":true,"tdm":true},"valid_until":null},"sha256":"fda3f1e9bb3538cd85dcc42281e00fd045f726652664439ce5a15d8489425b21","size":1000}]}