First implementation (#1)

Reviewed-on: #1

fixtures/records/anchor-keyed.json

@@ -0,0 +1 @@
+{"context":{"column_path_mac":["8de5d9cfdf71c50b161f357ab526bc7ffadd407c49c642a10112bb41cc4e1bc1","31824d3d0594c075074ff3a88e4c571e1f856218179a809f4f69bd5891ee7ff8"],"row_path_mac":["1db463578fc748d9686a5a1355c2a08086f4f331b546ec3273dd5e49ff1d178d","74bdccbc71693a4f8046f2e92bc477ff04fc5e04a8998e3ee189ba6b72b971e0"],"table_label_mac":"6943d614b69c7b2458c337ead13591262e932934151c27862ec0d47e4d560641"},"doc":"hale2026harmonic-damb","format":"scienting-anchor/1","keyed":{"algorithm":"sha-256","context":"layer:smithlab/kp4m2x7q","pages":["9dd865c7a19b44dc97a5d236859ed79174b25b72a5781d8df4f091d096de8908","1feb6882031349ca5eee822557bab0b6b0436a2d132ae8ca03babac2ff1948b8"],"scheme":"hkdf-pages"},"kind":"cell","node":"c20cna6","node_hash":"3efa98f63b493f7ba3ed01153859d3e0069fc39e1c51078b1239dedf0a4fc601","own_hash":"7bad196fc9634da03db3e418dfad50aa6b193acf9047e31db8908d9466c5ba40","quote":{"length":5,"mac":"0d8d4fcd55f1a4cfd7f254d597b7a5777b8865eb371283c03527ac8195ebb5ac"},"rev":12,"store":"smithlab"}