[split-required] Split remaining 500-680 LOC files (final batch)

website (17 pages + 3 components):
- multiplayer/wizard, middleware/wizard+test-wizard, communication
- builds/wizard, staff-search, voice, sbom/wizard
- foerderantrag, mail/tasks, tools/communication, sbom
- compliance/evidence, uni-crawler, brandbook (already done)
- CollectionsTab, IngestionTab, RiskHeatmap

backend-lehrer (5 files):
- letters_api (641 → 2), certificates_api (636 → 2)
- alerts_agent/db/models (636 → 3)
- llm_gateway/communication_service (614 → 2)
- game/database already done in prior batch

klausur-service (2 files):
- hybrid_vocab_extractor (664 → 2)
- klausur-service/frontend: api.ts (620 → 3), EHUploadWizard (591 → 2)

voice-service (3 files):
- bqas/rag_judge (618 → 3), runner (529 → 2)
- enhanced_task_orchestrator (519 → 2)

studio-v2 (6 files):
- korrektur/[klausurId] (578 → 4), fairness (569 → 2)
- AlertsWizard (552 → 2), OnboardingWizard (513 → 2)
- korrektur/api.ts (506 → 3), geo-lernwelt (501 → 2)

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

backend-lehrer/llm_gateway/services/__init__.py

@@ -6,6 +6,8 @@ from .inference import InferenceService, get_inference_service
 from .playbook_service import PlaybookService
 from .pii_detector import PIIDetector, get_pii_detector, PIIType, RedactionResult
 from .tool_gateway import ToolGateway, get_tool_gateway, SearchDepth
+from .communication_service import CommunicationService, get_communication_service
+from .communication_types import CommunicationType, CommunicationTone, LegalReference, GFKPrinciple
 
 __all__ = [
     "InferenceService",
@@ -18,4 +20,10 @@ __all__ = [
     "ToolGateway",
     "get_tool_gateway",
     "SearchDepth",
+    "CommunicationService",
+    "get_communication_service",
+    "CommunicationType",
+    "CommunicationTone",
+    "LegalReference",
+    "GFKPrinciple",
 ]