Exercise feature activation rollback and old-session artifact retention

Assistant: codex
Assistant-Model: gpt-6-astra
Assistant-Session: 01a0cffe-206f-7323-89d3-b20ca4cf4bf9

research/experiments/feature-release/package-lock.json

@@ -0,0 +1,40 @@
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+      "license": "Apache-2.0",
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+}