fix(lint): object-field-ref-unknown's index message says the skip is an error that drift reports

The SQL driver now logs a skipped declared index at error and os migrate
plan reports it, so the message tail and the rule's docblock, which said
warning and dropped, would have been false in the same release. Text
only: the rule, severity, id and prescription are unchanged; the one
pinned string in the rule's test follows the new wording.

Claude-Session: https://claude.ai/code/session_01N8TPEsoJxPsdSdNKGnNGEN
Co-authored-by: Claude <noreply@anthropic.com>

Author: claude

.changeset/20432-skipped-index-durability.md

@@ -2,6 +2,7 @@
 '@objectstack/driver-sql': minor
 '@objectstack/spec': patch
 '@objectstack/platform-objects': patch
+'@objectstack/lint': patch
 ---
 
 fix(driver-sql): a declared index that can never be built is logged at `error` and reported in drift
@@ -52,6 +53,11 @@ to handle.
 said the skip left "a warning in the server log". It now says an error, in English and in the
 zh-CN, ja-JP and es-ES translations. Nothing else in the text changes.
 
+**The lint message follows too.** `object-field-ref-unknown`, on a misspelt `indexes[].fields`
+name, said the SQL driver skips the index "with only a warning, and drift drops it too". It now
+says the skip is logged at error and `os migrate plan` reports the index as unbuildable. The rule,
+its severity and its prescription are unchanged.
+
 **Upgrade note:** on a database that already carries such an index, `os migrate plan` now
 reports one entry per index, and so does the boot's drift warning. That entry clears only when
 the metadata names stored fields or drops the index.

packages/lint/src/validate-object-field-refs.test.ts

@@ -603,7 +603,7 @@ describe('validateObjectFieldRefs — indexes[].fields (verbatim physical column
     });
     expect(findings[0]!.message).toContain('"totl" is not a field on object "crm_invoice"');
     expect(findings[0]!.message).toContain('Did you mean "total"?');
-    expect(findings[0]!.message).toContain('`unique` index is then silently unenforced');
+    expect(findings[0]!.message).toContain('`unique` index is then unenforced');
     expect(findings[0]!.hint).toContain('Fields on "crm_invoice":');
   });
 

packages/lint/src/validate-object-field-refs.ts

@@ -163,8 +163,11 @@
  *    still skips the index at sync. `indexes[].fields[]` used to sit in this
  *    list whole, as a storage question for the registration path answered
  *    against the physical column set. That left a MISSPELLING with no door at
- *    all: the sync's skip is a `warn` and drift drops the index, so nothing
- *    anywhere refused a name that is not a field. Existence is therefore
+ *    all: the sync's skip was a `warn` and drift dropped the index, so nothing
+ *    anywhere refused a name that is not a field. (Since #20432 step 2 the
+ *    skip is logged at `error` through `logDurabilityFailure` and `os migrate
+ *    plan` reports the unbuildable index, but both still come after the
+ *    authoring doors.) Existence is therefore
  *    judged here, against the authored field map plus the injected columns —
  *    exactly the physical set a correct name can land in — and only the
  *    materialization question stays with the sync (#20432 step 2, the
@@ -322,9 +325,9 @@ const LIST_POSITIONS: readonly ListPosition[] = [
  */
 const INDEX_POSITION = {
   consequence:
-    'The SQL driver skips the WHOLE index at sync with only a warning, and drift drops it too, '
-    + 'so `os migrate plan` never reports it: a `unique` index is then silently unenforced '
-    + 'while everything looks normal.',
+    'The SQL driver skips the WHOLE index at sync. It logs the skip at error and `os migrate plan` '
+    + 'reports the index as unbuildable, but the object keeps serving: a `unique` index is then '
+    + 'unenforced until the name is fixed.',
   prescription:
     'Fix the column name. An index column is a field of this object, or a column the platform '
     + 'injects on it (`created_at`, `organization_id`, …), spelled exactly — never a dotted path.',