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Marc-André Bombeck
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The boot key check recorded whatever key was configured whenever its probe found nothing to try. It only read string columns, so an install whose ciphertext sat in Bytes columns (notes, documents, ECG, symptoms) read as empty; a probe that ran out of time did the same; and rows written by a process that served under a wrong key could open on the next boot and get that key recorded as the right one. The probe now reads every registered column, string and Bytes, in all four stored layouts, and tries the oldest values first, ordered by the row's updatedAt (else createdAt, else primary key). A key is recorded only when the oldest value that opens is preceded by at most one that does not, or when no column holds a single value under the key id. A time-out, an unreadable table, oversized values or mixed results are inconclusive: the process serves, records nothing and checks again at the next start. When the first insert loses a race, the stored record is read back and must open under this process's key, else the outcome is a mismatch. A rotation that walked every column without errors removes the record of each previous key id that no longer holds any value. The refusal log block and the self-hosting pages explain how to reset the check for a key id.