docs(spec): regenerate the API reference for the seven new ledger codes (#3843)

CI's TypeScript Type Check job runs `check:docs`, which failed: registering seven
codes in ERROR_CODE_LEDGER widens the `ErrorCode` union, and every generated
reference page that renders an `ApiErrorSchema`-shaped field embeds that union
inline. content/docs/references/** is AUTO-GEN (AGENTS.md) — regenerated with
`gen:schema && gen:docs` rather than hand-edited.

The diff is exactly this change: error-code-ledger.mdx gains the seven codes, and
ten pages re-render the widened union in place. 251 generated files back in sync.

I had run lint and the package test suites but not this job locally — the gate is
in the typecheck job rather than the test job, which is easy to miss.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01CYbS3kS8xzsHNXFTzp4e2z

Author: claude

content/docs/references/api/analytics.mdx

@@ -150,6 +150,7 @@ const result = ErrorCode.parse(data);
 * `CREATE_FAILED`
 * `CUBE_NOT_FOUND`
 * `DATASET_INVALID`
+* `DATASOURCE_ADMIN_ERROR`
 * `DELEGABLE_SCOPE_FAILED`
 * `DOMAIN_VERIFICATION_FAILED`
 * `DUPLICATE_REQUEST`
@@ -168,6 +169,7 @@ const result = ErrorCode.parse(data);
 * `EXPIRY_TOO_LONG`
 * `EXPLAIN_FAILED`
 * `EXPORT_NOT_PERMITTED`
+* `EXTERNAL_IMPORT_ERROR`
 * `EXTERNAL_SCHEMA_MISMATCH`
 * `EXTERNAL_SCHEMA_MODE_VIOLATION`
 * `EXTERNAL_WRITE_FORBIDDEN`
@@ -218,6 +220,10 @@ const result = ErrorCode.parse(data);
 * `OBJECT_API_DISABLED`
 * `OBJECT_API_METHOD_NOT_ALLOWED`
 * `OS_PROTOCOL_INCOMPATIBLE`
+* `PACKAGE_DELETE_FAILED`
+* `PACKAGE_DELETE_PARTIAL`
+* `PACKAGE_MANIFEST_INVALID`
+* `PACKAGE_PUBLISH_FAILED`
 * `PASSWORD_ALREADY_SET`
 * `PASSWORD_EXPIRED`
 * `PASSWORD_POLICY_VIOLATION`
@@ -249,6 +255,7 @@ const result = ErrorCode.parse(data);
 * `RULE_NOT_FOUND`
 * `SCHEDULES_LIST_FAILED`
 * `SCHEDULE_DELETE_FAILED`
+* `SETTINGS_ACTION_FAILED`
 * `SETTINGS_FORBIDDEN`
 * `SETTINGS_LOCKED`
 * `SETTINGS_UNKNOWN_KEY`