test(cli): align metabase fixtures with required api_url field

The driver-discriminated union added in this branch now requires api_url
for metabase connections and a known driver for warehouses. Update slow
CLI test fixtures and assertions so they exercise the new schema:
- ingest.test-utils.ts: add api_url to the prod-metabase fixture.
- setup.test.ts: switch metabase fixture from 'url' to 'api_url'.
- local-scan-connectors.test.ts: invalid-driver/missing-driver tests now
  expect the schema error from loadKtxProject (parse-time rejection).

packages/cli/src/ingest.test-utils.ts

@@ -109,6 +109,7 @@ export async function writeWarehouseConfig(projectDir: string): Promise<void> {
       'connections:',
       '  prod-metabase:',
       '    driver: metabase',
+      '    api_url: https://metabase.example.test',
       '  warehouse_a:',
       '    driver: postgres',
       'ingest:',

packages/cli/src/local-scan-connectors.test.ts

@@ -92,7 +92,7 @@ describe('createKtxCliScanConnector', () => {
     expect(bigQueryMock.constructorInputs[0]).not.toHaveProperty('maxBytesBilled');
   });
 
-  it('throws for structural daemon-only fallback configs', async () => {
+  it('rejects daemon-only fallback driver configs at config parse time', async () => {
     await initKtxProject({ projectDir: tempDir });
     await writeFile(
       join(tempDir, 'ktx.yaml'),
@@ -105,14 +105,13 @@ describe('createKtxCliScanConnector', () => {
       ].join('\n'),
       'utf-8',
     );
-    const project = await loadKtxProject({ projectDir: tempDir });
 
-    await expect(createKtxCliScanConnector(project, 'warehouse')).rejects.toThrow(
-      'Connection "warehouse" uses driver "duckdb", which has no native standalone KTX scan connector',
+    await expect(loadKtxProject({ projectDir: tempDir })).rejects.toThrow(
+      /connections\.warehouse\.driver:.*Invalid discriminator value/,
     );
   });
 
-  it('throws a clear error when the connection block has no driver field', async () => {
+  it('rejects connection blocks with no driver field at config parse time', async () => {
     await initKtxProject({ projectDir: tempDir });
     await writeFile(
       join(tempDir, 'ktx.yaml'),
@@ -125,10 +124,9 @@ describe('createKtxCliScanConnector', () => {
       ].join('\n'),
       'utf-8',
     );
-    const project = await loadKtxProject({ projectDir: tempDir });
 
-    await expect(createKtxCliScanConnector(project, 'warehouse')).rejects.toThrow(
-      'Connection "warehouse" has no `driver` field in ktx.yaml',
+    await expect(loadKtxProject({ projectDir: tempDir })).rejects.toThrow(
+      /connections\.warehouse\.driver:.*Invalid discriminator value/,
     );
   });
 });

packages/cli/src/setup.test.ts

@@ -311,7 +311,7 @@ describe('setup status', () => {
         '    url: env:DATABASE_URL',
         '  metabase:',
         '    driver: metabase',
-        '    url: env:METABASE_URL',
+        '    api_url: https://metabase.example.test',
         '    api_key_ref: env:METABASE_API_KEY',
         '    warehouse_connection_id: warehouse',
         'llm:',