Implement SAND-WP-0003: validation meta-framework extraction

Port e2e-framework schema, runner, and reporter into wise-validator with
sand-boxer CLI integration, validate run CLI, unit tests, registry capability,
and operator docs.

tests/test_schema.py

@@ -0,0 +1,25 @@
+"""E2EConfig schema tests."""
+
+from pathlib import Path
+
+import pytest
+
+from wisevalidator.schema import E2EConfig, HealthCheck
+
+FIXTURE_REPO = Path(__file__).parent / "fixtures" / "minimal_repo"
+
+
+def test_load_minimal_fixture() -> None:
+    config = E2EConfig.load(FIXTURE_REPO)
+    assert config.name == "fixture-repo"
+    assert config.compose_file == "docker-compose.yml"
+    assert config.test_command == "echo ok"
+    assert len(config.health_checks) == 1
+    assert config.health_checks[0] == HealthCheck(
+        name="web", url="http://localhost:8080", timeout=30
+    )
+
+
+def test_missing_e2e_yml(tmp_path: Path) -> None:
+    with pytest.raises(FileNotFoundError, match="No e2e.yml"):
+        E2EConfig.load(tmp_path)