`_note_rows` carried 16 of the `notes` table's 27 columns. A backup -> restore
cycle reported success and handed back a corpus with every snippet and process
flattened into a plain note, every issue and spike into `work`, every
provenance edge gone, and recurring tasks no longer recurring. The record-type
and kind vocabulary is what #3128 and milestone 312 were about, and a restore
erased it.
Two more found by auditing every row helper rather than only the one being
edited: `_milestone_rows` dropped `body` — a milestone IS the plan (0066), so
every plan restored as a title with no reasoning behind it — and
`_repo_binding_rows` dropped `ref`, the branch a ledger follows (#2873), so a
restored binding silently accounts for a different tree.
`arose_from_id` is deferred to a second pass beside `parent_id`, never written
in the constructor: it is an id in the SOURCE database, so copying it through
lands the edge on whatever record happens to hold that number here. An edge
whose target did not survive stays NULL rather than being guessed at. This is
the trap that kept the fix out of milestone 317 step 1.
THE STRUCTURAL HALF. The coverage guard from #2293 checks TABLES against
Base.metadata; nothing checked COLUMNS, which is how nine went missing from a
table that had been "covered" for years — added to the model and the migration,
both of which fail loudly, and never to the serialiser, which fails silently.
`_COLUMN_EXCLUSIONS` now declares, per table, every column deliberately not
exported and why, and a parameterised guard walks all 23 helpers and asserts
the two agree. Forgetting is no longer expressible.
Reconciling all 23 turned up one more deliberate exclusion worth naming: the
`code_shapes` proposal columns are the machine's standing suggestion, cleared
by judgment and recomputed by every refresh, so carrying them would restore
stale guesses over a tree the proposer has not seen.
Tests: the round trip drives the REAL restore_full_backup against Postgres,
not a reimplementation of its loop — a test that re-derives the remap it is
checking would agree with whatever the product does, including nothing.
Backup v12.
bvandeusen
a6ef3a6a5a