Add shared credential envelope infrastructure

src/govoplan_core/server/app.py

@@ -8,6 +8,7 @@ from govoplan_core.db.session import configure_database
 from govoplan_core.server.config import GovoplanServerConfig, load_server_config
 from govoplan_core.server.fastapi import create_govoplan_app
 from govoplan_core.server.platform import create_platform_router
+from govoplan_core.server.credentials import router as credential_router
 from govoplan_core.server.registry import available_module_manifests, build_platform_registry
 from govoplan_core.server.route_validation import validate_no_route_collisions
 
@@ -67,6 +68,7 @@ def _server_api_router(server_config: GovoplanServerConfig, registry) -> APIRout
     for router in server_config.base_routers:
         api_router.include_router(router)
     api_router.include_router(create_platform_router(settings=server_config.settings))
+    api_router.include_router(credential_router)
     for router in server_config.post_module_routers:
         api_router.include_router(router)
     for contribution in server_config.extra_routers: