Fix version check endpoint authentication

Changed version check endpoints to use X-API-Key authentication instead of Bearer token authentication. This makes them consistent with all other license server endpoints.

Changes:
- Updated /api/version/check to use validate_api_key dependency
- Updated /api/version/latest to use validate_api_key dependency
- Both endpoints now expect X-API-Key header instead of Authorization Bearer
- Fixes HTTP 403 errors reported by client applications

This resolves the issue where session heartbeat worked but version check failed with 403 Forbidden.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

v2_lizenzserver/app/api/version.py

@@ -5,7 +5,7 @@ from packaging import version
 from app.db.database import get_db
 from app.models.models import Version, License
 from app.schemas.license import VersionCheckRequest, VersionCheckResponse
-from app.core.security import get_api_key
+from app.core.api_key_auth import validate_api_key
 
 router = APIRouter()
 
@@ -13,7 +13,7 @@ router = APIRouter()
 async def check_version(
     request: VersionCheckRequest,
     db: Session = Depends(get_db),
-    api_key = Depends(get_api_key)
+    api_key: str = Depends(validate_api_key)
 ):
     license = db.query(License).filter(
         License.license_key == request.license_key,
@@ -63,7 +63,7 @@ async def check_version(
 @router.get("/latest")
 async def get_latest_version(
     db: Session = Depends(get_db),
-    api_key = Depends(get_api_key)
+    api_key: str = Depends(validate_api_key)
 ):
     latest_version = db.query(Version).order_by(Version.release_date.desc()).first()