feat(backend/jobs): add agent_id parameter

backend/docs/docs.go

@@ -1059,6 +1059,12 @@ const docTemplate = `{
                         "description": "Time period (e.g. 1h, 24h, 7d)",
                         "name": "period",
                         "in": "query"
+                    },
+                    {
+                        "type": "string",
+                        "description": "Filter by agent ID",
+                        "name": "agent_id",
+                        "in": "query"
                     }
                 ],
                 "responses": {

backend/docs/swagger.json

@@ -1048,6 +1048,12 @@
                         "description": "Time period (e.g. 1h, 24h, 7d)",
                         "name": "period",
                         "in": "query"
+                    },
+                    {
+                        "type": "string",
+                        "description": "Filter by agent ID",
+                        "name": "agent_id",
+                        "in": "query"
                     }
                 ],
                 "responses": {

backend/docs/swagger.yaml

@@ -1229,6 +1229,10 @@ paths:
         in: query
         name: period
         type: string
+      - description: Filter by agent ID
+        in: query
+        name: agent_id
+        type: string
       produces:
       - application/json
       responses:

backend/internal/handlers/jobs.go

@@ -230,6 +230,7 @@ type JobMetricsOut struct {
 // @Tags jobs
 // @Produce json
 // @Param period query string false "Time period (e.g. 1h, 24h, 7d)" default(24h)
+// @Param agent_id query string false "Filter by agent ID"
 // @Success 200 {object} JobMetricsOut
 // @Failure 400 {object} map[string]string
 // @Security Bearer
@@ -242,8 +243,9 @@ func (h *JobsHandlers) GetJobMetrics(c *gin.Context) {
 		return
 	}
 
+	agentID := c.Query("agent_id")
 	since := time.Now().Add(-period)
-	metrics, err := h.jobRepo.GetJobMetrics(c.Request.Context(), since)
+	metrics, err := h.jobRepo.GetJobMetrics(c.Request.Context(), since, agentID)
 	if err != nil {
 		c.Error(err)
 		return

backend/internal/repository/job_repository.go

@@ -113,18 +113,22 @@ type JobMetrics struct {
 }
 
 // GetJobMetrics returns job success metrics for jobs updated since the given time.
-// A successful job has status == 0, failed has status != 0, pending has status == 0 with empty stdout/stderr.
-func (r *JobRepository) GetJobMetrics(ctx context.Context, since time.Time) (JobMetrics, error) {
+// If agentID is non-empty, results are filtered to that agent only.
+func (r *JobRepository) GetJobMetrics(ctx context.Context, since time.Time, agentID string) (JobMetrics, error) {
 	var m JobMetrics
-	err := r.DB.QueryRowContext(ctx,
-		`SELECT
-			COUNT(*),
-			SUM(CASE WHEN status = 0 AND (stdout != '' OR stderr != '') THEN 1 ELSE 0 END),
-			SUM(CASE WHEN status != 0 THEN 1 ELSE 0 END),
-			SUM(CASE WHEN status = 0 AND stdout = '' AND stderr = '' THEN 1 ELSE 0 END)
-		FROM jobs WHERE updated_at >= ?`,
-		since,
-	).Scan(&m.Total, &m.Success, &m.Failed, &m.Pending)
+	query := `SELECT
+		COUNT(*),
+		SUM(CASE WHEN status = 0 AND (stdout != '' OR stderr != '') THEN 1 ELSE 0 END),
+		SUM(CASE WHEN status != 0 THEN 1 ELSE 0 END),
+		SUM(CASE WHEN status = 0 AND stdout = '' AND stderr = '' THEN 1 ELSE 0 END)
+	FROM jobs WHERE updated_at >= ?`
+	args := []any{since}
+	if agentID != "" {
+		query += " AND agent_id = ?"
+		args = append(args, agentID)
+	}
+
+	err := r.DB.QueryRowContext(ctx, query, args...).Scan(&m.Total, &m.Success, &m.Failed, &m.Pending)
 	if err != nil {
 		return JobMetrics{}, err
 	}