feat(ops): add account switch metrics and trend

backend/internal/repository/ops_repo_metrics.go

@@ -43,6 +43,7 @@ INSERT INTO ops_system_metrics (
   upstream_529_count,
 
   token_consumed,
+  account_switch_count,
   qps,
   tps,
 
@@ -81,14 +82,14 @@ INSERT INTO ops_system_metrics (
   $1,$2,$3,$4,
   $5,$6,$7,$8,
   $9,$10,$11,
-  $12,$13,$14,
-  $15,$16,$17,$18,$19,$20,
-  $21,$22,$23,$24,$25,$26,
-  $27,$28,$29,$30,
-  $31,$32,
-  $33,$34,
-  $35,$36,$37,
-  $38,$39
+  $12,$13,$14,$15,
+  $16,$17,$18,$19,$20,$21,
+  $22,$23,$24,$25,$26,$27,
+  $28,$29,$30,$31,
+  $32,$33,
+  $34,$35,
+  $36,$37,$38,
+  $39,$40
 )`
 
 	_, err := r.db.ExecContext(
@@ -109,6 +110,7 @@ INSERT INTO ops_system_metrics (
 		input.Upstream529Count,
 
 		input.TokenConsumed,
+		input.AccountSwitchCount,
 		opsNullFloat64(input.QPS),
 		opsNullFloat64(input.TPS),
 
@@ -177,7 +179,8 @@ SELECT
   db_conn_waiting,
 
   goroutine_count,
-  concurrency_queue_depth
+  concurrency_queue_depth,
+  account_switch_count
 FROM ops_system_metrics
 WHERE window_minutes = $1
   AND platform IS NULL
@@ -199,6 +202,7 @@ LIMIT 1`
 	var dbWaiting sql.NullInt64
 	var goroutines sql.NullInt64
 	var queueDepth sql.NullInt64
+	var accountSwitchCount sql.NullInt64
 
 	if err := r.db.QueryRowContext(ctx, q, windowMinutes).Scan(
 		&out.ID,
@@ -217,6 +221,7 @@ LIMIT 1`
 		&dbWaiting,
 		&goroutines,
 		&queueDepth,
+		&accountSwitchCount,
 	); err != nil {
 		return nil, err
 	}
@@ -273,6 +278,10 @@ LIMIT 1`
 		v := int(queueDepth.Int64)
 		out.ConcurrencyQueueDepth = &v
 	}
+	if accountSwitchCount.Valid {
+		v := accountSwitchCount.Int64
+		out.AccountSwitchCount = &v
+	}
 
 	return &out, nil
 }