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>

.gitea/workflows/test.yaml

@@ -0,0 +1,38 @@
+name: Tests
+
+on:
+  push:
+    branches-ignore: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  fast-tests:
+    runs-on: [self-hosted]
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Run fast tests (unit + e2e)
+        run: ./test.sh ci
+
+  full-tests:
+    runs-on: [self-hosted, oracle]
+    needs: fast-tests
+    if: github.event_name == 'pull_request'
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Run full tests (with Oracle)
+        run: ./test.sh full
+        env:
+          ORACLE_DSN: ${{ secrets.ORACLE_DSN }}
+          ORACLE_USER: ${{ secrets.ORACLE_USER }}
+          ORACLE_PASSWORD: ${{ secrets.ORACLE_PASSWORD }}
+
+      - name: Upload QA reports
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: qa-reports
+          path: qa-reports/
+          retention-days: 30