Main's codec-document tests and the RUDP document-handle test read a record
stored under codec_note, plain_note or a foreign id through a handle for an
alias schema, and one store test picked among foreign-id records by whether
they parse. retire-schema-alias makes that read refuse; C2a's own tests
(a handle reads only records under an id its definition declares) pin the
rule. The codec reads and syncs under the definition's own id stay.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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