Update pytest configuration and documentation for training planning integration

- Enhanced the pytest workflow in `.gitea/workflows/test.yml` to include `TRAINING_PLANNING_INTEGRATION` for improved testing against the PostgreSQL database.
- Updated `pytest.ini` to clarify integration marker usage, specifying both `ACCESS_LAYER_INTEGRATION` and `TRAINING_PLANNING_INTEGRATION`.
- Revised documentation in `test_training_planning_sections_integration.py` to provide clearer activation instructions for local and CI environments.

.gitea/workflows/test.yml

@@ -10,7 +10,7 @@ on:
     types: [completed]
 
 jobs:
-  # Wie Mitai-Jinkendo: pytest im laufenden backend-Container (Python aus Image, gleiche DB wie Deploy).
+  # Pytest im laufenden backend-Container; ACCESS_LAYER + TRAINING_PLANNING Integration gegen dieselbe PostgreSQL wie Deploy (Schema via Container-Start migriert).
   pytest-backend:
     if: ${{ github.event_name != 'workflow_run' || github.event.workflow_run.conclusion == 'success' }}
     runs-on: ubuntu-latest
@@ -39,7 +39,7 @@ jobs:
             cd /app &&
             ACCESS_LAYER_STRICT=1 python scripts/check_access_layer_hints.py &&
             python scripts/security_release_checks.py &&
-            ACCESS_LAYER_INTEGRATION=1 SKIP_DB_MIGRATE=1 python -m pytest tests -m 'not slow' -ra -vv --tb=short
+            ACCESS_LAYER_INTEGRATION=1 TRAINING_PLANNING_INTEGRATION=1 SKIP_DB_MIGRATE=1 python -m pytest tests -m 'not slow' -ra -vv --tb=short
           "
 
   lint-backend:

backend/pytest.ini

@@ -6,5 +6,5 @@ python_functions = test_*
 addopts = -q --tb=short
 markers =
     smoke: Schnelle Kern-Regression.
-    integration: PostgreSQL-Mandanten-Integration (ACCESS_LAYER_INTEGRATION=1).
+    integration: PostgreSQL-Integration (z. B. ACCESS_LAYER_INTEGRATION=1, TRAINING_PLANNING_INTEGRATION=1).
     slow: Lange/schwere Tests; in CI wie Mitai-Jinkendo ausgeschlossen (Auswahl: not slow).

backend/tests/test_training_planning_sections_integration.py

@@ -1,9 +1,9 @@
 """
 PostgreSQL-Integration: Roundtrip _replace_unit_sections ↔ _fetch_sections.
 
-Aktivierung (lokal, analog zu test_access_layer_integration):
-  set TRAINING_PLANNING_INTEGRATION=1
-  pytest tests/test_training_planning_sections_integration.py -v -m integration
+Aktivierung:
+  - Lokal: TRAINING_PLANNING_INTEGRATION=1
+  - CI: .gitea/workflows/test.yml setzt die Variable beim pytest-Lauf (deployter Backend-Container + PostgreSQL).
 
 Voraussetzung: migrierte DB, DB_* wie Docker-Compose.
 """