docs(slos): update throughput to 6–7 M events/day (~250–400 events/sec)

Author: sahilgundu

docs/06-slos-observability.md

@@ -1,11 +1,14 @@
 # SLOs & Observability
 
 **Service Level Objectives**
-- E2E latency p95 **< 90s**
-- Delivery success **≥ 99.5%**
-- DLQ rate **< 0.5%** of daily volume
+
+- E2E latency p95 **< 90 s**
+- Delivery success **≥ 99.5 %**
+- DLQ rate **< 0.5 %** of daily volume
+- Throughput **~6–7 M events/day (~250–400 events/sec)**
 
 **Dashboards & Alerts**
-- Dataflow: backlog, watermark skew, worker utilization, error counts
-- BigQuery: slot utilization, query latency, bytes scanned anomalies
-- Logs-based metrics -> Alerting (email/on-call)
+
+- Dataflow: backlog, watermark skew, worker utilization, error counts  
+- BigQuery: slot utilization, query latency, bytes-scanned anomalies  
+- Logs-based metrics → alerting (email / on-call)