feat(e2e): add Phase A scenarios, fixtures, and results store

7 human-authored test scenarios (22 tests) using data-testid
selectors. Test fixture generator for isolated environments.
JSON results store (no native deps). WebDriverIO config updated
with TCP readiness probe and multi-spec support.

v2/tests/e2e/tsconfig.json

@@ -7,5 +7,5 @@
     "esModuleInterop": true,
     "skipLibCheck": true
   },
-  "include": ["specs/**/*.ts"]
+  "include": ["specs/**/*.ts", "*.ts"]
 }