feat(stability): unify readiness and recovery

backend/Controllers/HealthController.cs

@@ -18,6 +18,26 @@ public class HealthController(IAgentRuntime runtime, HealthCheckService healthCh
             agentSource = "openclaw-rpc"
         });
 
+    [AllowAnonymous]
+    [HttpGet("/health/ready")]
+    [ProducesResponseType(StatusCodes.Status200OK)]
+    [ProducesResponseType(StatusCodes.Status503ServiceUnavailable)]
+    public async Task<IResult> Ready(CancellationToken ct)
+    {
+        var report = await healthChecks.CheckHealthAsync(
+            registration => registration.Tags.Contains("ready"),
+            ct);
+        var payload = new
+        {
+            status = report.Status == HealthStatus.Healthy ? "Healthy" : "Unhealthy",
+            timestamp = DateTimeOffset.UtcNow
+        };
+
+        return report.Status == HealthStatus.Healthy
+            ? Results.Ok(payload)
+            : Results.Json(payload, statusCode: StatusCodes.Status503ServiceUnavailable);
+    }
+
     [AllowAnonymous]
     [HttpGet("/health")]
     public async Task<IResult> Get(CancellationToken ct)