Extends the derived check to `file_attached_blobs` and renames it, since
the two tables are one concept — the content-keyed and file-keyed halves
of "things attached to a Blob" — and `storage.copy_file_satellites`
already established the vocabulary.
The attached half is the one that cannot be recovered.
`attached_dangling_blob` is data_loss with `recoverable: false`: those
bytes were user-supplied and have no server-side render path, so nothing
can regenerate them. Its derived twin carries `recoverable: true`,
because a derived artifact is a pure function of its source and
re-rendering restores it. Same finding shape, materially different
stakes, and the detail says which.
No orphan-mapping check on the attached side, deliberately: `file_id` is
ON DELETE CASCADE, so a row cannot outlive its file. The database
enforces what the derived table cannot, since a content hash has no row
to point a foreign key at — which is exactly why only that half could
rot.
One job walking two tables needs a phase in the cursor, or an attached
checkpoint would be replayed against the derived table and silently
re-scan or skip.
Two things the sweep was missing, found while checking whether every
consistency job is actually exercised:
drives_consistency and folders_consistency were registered but never
run by any test. Now included; the list is exhaustive by intent.
An unknown job was a warning-and-skip. That protected feature-gated
builds at the cost of something worse: this list said
`derived_consistency` for one commit after the rename and would have
dropped that coverage without a word, leaving the suite green over a
check that no longer ran. It fails now.
Edouard Vanbelle