Restructure: Move 52 files into 7 domain packages

korrektur/ zeugnis/ admin/ compliance/ worksheet/ training/ metrics/
52 shims, relative imports, RAG untouched.

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

klausur-service/backend/eh_templates.py

@@ -1,34 +1,4 @@
-"""
-Erwartungshorizont Templates for Vorabitur Mode — barrel re-export.
-
-The actual code lives in:
-  - eh_templates_types.py       (AUFGABENTYPEN, EHKriterium, EHTemplate)
-  - eh_templates_analyse.py     (Textanalyse, Gedicht, Prosa, Drama)
-  - eh_templates_eroerterung.py (Eroerterung textgebunden)
-  - eh_templates_registry.py    (TEMPLATES, get_template, list_templates, etc.)
-"""
-
-# Types
-from eh_templates_types import (  # noqa: F401
-    AUFGABENTYPEN,
-    EHKriterium,
-    EHTemplate,
-)
-
-# Template factories
-from eh_templates_analyse import (  # noqa: F401
-    get_textanalyse_template,
-    get_gedichtanalyse_template,
-    get_prosaanalyse_template,
-    get_dramenanalyse_template,
-)
-from eh_templates_eroerterung import get_eroerterung_template  # noqa: F401
-
-# Registry
-from eh_templates_registry import (  # noqa: F401
-    TEMPLATES,
-    initialize_templates,
-    get_template,
-    list_templates,
-    get_aufgabentypen,
-)
+# Backward-compat shim -- module moved to korrektur/eh_templates.py
+import importlib as _importlib
+import sys as _sys
+_sys.modules[__name__] = _importlib.import_module("korrektur.eh_templates")