refactor: Consolidate standalone services into admin-v2, add new SDK modules

Remove standalone services (ai-compliance-sdk root, developer-portal,
dsms-gateway, dsms-node, night-scheduler) and legacy compliance/dsgvo pages.
Add new SDK pipeline modules (academy, document-crawler, dsb-portal,
incidents, whistleblower, reporting, sso, multi-tenant, industry-templates).
Add drafting engine, legal corpus files (AT/CH/DE), pitch-deck,
blog and Förderantrag pages.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

backend/middleware/__init__.py

@@ -7,6 +7,7 @@ This module provides middleware components for the FastAPI backend:
 - Rate Limiter: Protects against abuse (Valkey-based)
 - PII Redactor: Redacts sensitive data from logs
 - Input Gate: Validates request body size and content types
+- SDK Protection: Protects SDK endpoints from systematic enumeration
 """
 
 from .request_id import RequestIDMiddleware, get_request_id
@@ -14,6 +15,7 @@ from .security_headers import SecurityHeadersMiddleware
 from .rate_limiter import RateLimiterMiddleware
 from .pii_redactor import PIIRedactor, redact_pii
 from .input_gate import InputGateMiddleware
+from .sdk_protection import SDKProtectionMiddleware, SDKProtectionConfig
 
 __all__ = [
     "RequestIDMiddleware",
@@ -23,4 +25,6 @@ __all__ = [
     "PIIRedactor",
     "redact_pii",
     "InputGateMiddleware",
+    "SDKProtectionMiddleware",
+    "SDKProtectionConfig",
 ]