feat: live tracker suite - WIKITOOL_TASKS_CONFIG override, real-tracker tests for Super Productivity and CalDAV, nightly workflow and test image (#156)

Files changed:
- .gitea/scripts/start-radicale.sh
- .gitea/sp-live/Dockerfile
- .gitea/sp-live/resolve-version.sh
- .gitea/workflows/ci.yml
- .gitea/workflows/sp-live-image.yml
- .gitea/workflows/tracker-live.yml
- .gitignore
- CHANGES.md
- DEVELOPMENT.md
- INSTALL.md
- VERSION
- instructions/dev/doc-pull-through.md
- instructions/dev/stack-dev/SKILL.md
- instructions/dev/testing-conventions.md
- instructions/dev/tracker-testing.md
- kb/gtd/INDEX.md
- kb/gtd/technik/Chemenu 8.0.0 freigeben.md
- kb/gtd/technik/Windows nativ unterstützen.md
- kb/index.md
- tools/CONTRACT.md
- tools/chemenu/commands/docs_verify.py
- tools/chemenu/commands/doctor.py
- tools/chemenu/commands/review_cmd.py
- tools/chemenu/commands/task_cmd.py
- tools/chemenu/config.py
- tools/chemenu/tasks/config.py
- tools/chemenu/tests/conftest.py
- tools/chemenu/tests/fixtures/sp/MANIFEST.json
- tools/chemenu/tests/fixtures/sp/api/health.json
- tools/chemenu/tests/fixtures/sp/api/projects.json
- tools/chemenu/tests/fixtures/sp/api/tags.json
- tools/chemenu/tests/fixtures/sp/api/tasks.json
- tools/chemenu/tests/fixtures/sp/seed-backup.json
- tools/chemenu/tests/record_sp_fixtures.py
- tools/chemenu/tests/sp_headless.py
- tools/chemenu/tests/test_doctor.py
- tools/chemenu/tests/test_review.py
- tools/chemenu/tests/test_sp_recorded.py
- tools/chemenu/tests/test_task_cmd.py
- tools/chemenu/tests/test_tasks_config.py
- tools/chemenu/tests/test_tracker_live.py
- tools/chemenu/tests/tracker_live.py
- tools/pytest.ini

.gitea/workflows/ci.yml

@@ -132,6 +132,21 @@ jobs:
           .venv/bin/python -m pytest -q \
             --cov --cov-report=term --cov-report=xml --cov-report=html
 
+      - name: Live tracker suite (CalDAV)
+        # The one live tracker that needs no app and no display: a throwaway Radicale on
+        # loopback. `CHEMENU_LIVE_REQUIRE=caldav` turns "no server" into a failure - without
+        # it the suite would skip and stay green, which is exactly the outcome this step
+        # exists to rule out (Gitea #156). The Super Productivity half is nightly, in
+        # `tracker-live.yml`; see instructions/dev/tracker-testing.md.
+        env:
+          CHEMENU_LIVE_REQUIRE: caldav
+        run: |
+          set -eu
+          tools/.venv/bin/pip install --quiet radicale
+          .gitea/scripts/start-radicale.sh tools/.venv/bin/python /tmp/radicale
+          cd tools
+          .venv/bin/python -m pytest -q -m live_tracker -k caldav -s
+
       - name: Coverage report
         # `always()`: a red suite is exactly when the per-module numbers are
         # worth reading, and the upload must not disappear with the failure.