fix: enforce atomic agent registration contract

sdks/python/elydora/client.py

@@ -10,6 +10,7 @@ import requests
 
 from .crypto import compute_chain_hash, compute_payload_hash, sign_eor
 from .errors import ElydoraError
+from .integration_types import require_integration_type
 from .types import (
     AuditQueryResponse,
     AuthLoginResponse,
@@ -222,6 +223,7 @@ class ElydoraClient:
 
     def register_agent(self, request: RegisterAgentRequest) -> RegisterAgentResponse:
         """Register a new agent with the organization."""
+        require_integration_type(request.get("integration_type"))
         return self._request("POST", "/v1/agents/register", json_body=request)
 
     def get_agent(self, agent_id: str) -> GetAgentResponse: