Devin Review iter #3 found 3 new real bugs after iter #2's fixes landed.
🔴 RBAC check at app/api/query.py:362 used `row["name"]` against
`accessible_set`, but `accessible_set` is keyed by registry IDs
(`get_accessible_tables` returns `resource_grants.resource_id` —
table IDs, not display names). Confirmed by `_table_blocks` projection
at `app/resource_types.py:157-158`. When `id != name` (e.g.
`id="bq.finance.ue", name="ue"`), non-admin users with valid grants
got 403 `bq_path_access_denied`. Switch to `row["id"]`.
🚩 Bare-name pass at app/api/query.py:332 had the same name-vs-id
mismatch (different impact): legitimate accessible rows were skipped
from `dry_run_set`, so the cost guardrail under-counted scan bytes
for non-admin users. Could let an over-cap query through and
under-bill quota. Switch to `row_id` comparison.
🟡 `placeholder_from` for billing_project was dead code.
`_BQ_OPTIONAL_FIELD_DEFAULTS["billing_project"] = ""` seeded an empty
string into every GET payload via `_ensure_bq_optional_fields`. JS
`isUnset = (value === undefined)` evaluated False, so the
`(defaults to <project>)` placeholder NEVER rendered. Drop the seed —
field stays in `known_fields` (UI sees it) but routes through the
unset rendering path on GET, where placeholder_from fires.
Tests: test_get_surfaces_bq_fields_even_when_unset assertion flipped
from "billing_project IS present" to "billing_project NOT auto-seeded"
to lock in the new shape. 67 affected tests pass.
28aba4c1f9