introduce health endpoint for chat api

src/chat/api/app.py

@@ -7,6 +7,7 @@
 from chat.api.assistants.dependencies import get_assistant_service
 from chat.api.assistants.router import router as assistants_router
 from chat.api.dependencies import get_settings
+from chat.api.health.router import router as health_router
 from chat.api.messages.router import router as messages_router
 from chat.api.runs.router import router as runs_router
 from chat.api.threads.router import router as threads_router
@@ -40,4 +41,5 @@ async def lifespan(app: FastAPI) -> AsyncGenerator[None, None]:  # noqa: ARG001
 v1_router.include_router(threads_router)
 v1_router.include_router(messages_router)
 v1_router.include_router(runs_router)
+v1_router.include_router(health_router)
 app.include_router(v1_router)

src/chat/api/health/router.py

@@ -0,0 +1,18 @@
+from fastapi import APIRouter, status
+from pydantic import BaseModel
+
+router = APIRouter(prefix="/health", tags=["healthcheck"])
+
+
+class HealthCheck(BaseModel):
+    status: str = "OK"
+
+
+@router.get(
+    "",
+    summary="Perform a Health Check",
+    response_description="Return HTTP Status Code 200 (OK)",
+    status_code=status.HTTP_200_OK,
+)
+def get_health() -> HealthCheck:
+    return HealthCheck(status="OK")