test(app): update schema_report assertion for streaming_ask=true (Bug #9 follow-up)

schema_report_reflects_freshly_ingested_kb 가 `!streaming_ask` 를 assert 했으나
Bug #9 fix (760eee8) 로 streaming_ask 가 true 로 정정됨. assertion 을 반전.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

crates/kebab-app/tests/schema_report.rs

@@ -57,7 +57,7 @@ fn schema_report_reflects_freshly_ingested_kb() {
         schema.wire.schemas
     );
     assert!(schema.capabilities.json_mode);
-    assert!(!schema.capabilities.streaming_ask);
+    assert!(schema.capabilities.streaming_ask); // Bug #9: streaming_ask is now true
     assert!(
         schema.capabilities.mcp_server,
         "mcp_server should be true after fb-30",