feat: add CI/CD testing infrastructure with test.sh orchestrator

Complete testing system: pyproject.toml (pytest markers), test.sh
orchestrator with auto app start/stop and colorful summary,
pre-push hook, Gitea Actions workflow.

New QA tests: API health (7 endpoints), responsive (3 viewports),
log monitoring (ERROR/ORA-/Traceback detection), real GoMag sync,
PL/SQL package validation, smoke prod (read-only).

Converted test_app_basic.py and test_integration.py to pytest.
Added pytestmark to all existing tests (unit/e2e/oracle).
E2E conftest upgraded: console error collector, screenshot on
failure, auto-detect live app on :5003.

Usage: ./test.sh ci (30s) | ./test.sh full (2-3min)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

api/tests/qa/test_qa_api_health.py

@@ -0,0 +1,87 @@
+"""QA tests for API endpoint health and basic contract validation."""
+import time
+import urllib.request
+import pytest
+import httpx
+
+pytestmark = pytest.mark.qa
+
+ENDPOINTS = [
+    "/health",
+    "/api/dashboard/orders",
+    "/api/sync/status",
+    "/api/sync/history",
+    "/api/validate/missing-skus",
+    "/api/mappings",
+    "/api/settings",
+]
+
+
+@pytest.fixture(scope="session")
+def client(base_url):
+    """Create httpx client; skip all if app is not reachable."""
+    try:
+        urllib.request.urlopen(f"{base_url}/health", timeout=3)
+    except Exception:
+        pytest.skip(f"App not reachable at {base_url}")
+    with httpx.Client(base_url=base_url, timeout=10.0) as c:
+        yield c
+
+
+def test_health(client):
+    r = client.get("/health")
+    assert r.status_code == 200
+    data = r.json()
+    assert "oracle" in data
+    assert "sqlite" in data
+
+
+def test_dashboard_orders(client):
+    r = client.get("/api/dashboard/orders")
+    assert r.status_code == 200
+    data = r.json()
+    assert "orders" in data
+    assert "counts" in data
+
+
+def test_sync_status(client):
+    r = client.get("/api/sync/status")
+    assert r.status_code == 200
+    data = r.json()
+    assert "status" in data
+
+
+def test_sync_history(client):
+    r = client.get("/api/sync/history")
+    assert r.status_code == 200
+    data = r.json()
+    assert "runs" in data
+    assert isinstance(data["runs"], list)
+
+
+def test_missing_skus(client):
+    r = client.get("/api/validate/missing-skus")
+    assert r.status_code == 200
+    data = r.json()
+    assert "missing_skus" in data
+
+
+def test_mappings(client):
+    r = client.get("/api/mappings")
+    assert r.status_code == 200
+    data = r.json()
+    assert "mappings" in data
+
+
+def test_settings(client):
+    r = client.get("/api/settings")
+    assert r.status_code == 200
+    assert isinstance(r.json(), dict)
+
+
+@pytest.mark.parametrize("endpoint", ENDPOINTS)
+def test_response_time(client, endpoint):
+    start = time.monotonic()
+    client.get(endpoint)
+    elapsed = time.monotonic() - start
+    assert elapsed < 5.0, f"{endpoint} took {elapsed:.2f}s (limit: 5s)"