automod: visual helper metrics

automod/visual/abyss_client.go

···
 	"io"
 	"log/slog"
 	"net/http"
+	"time"
 
 	lexutil "github.com/bluesky-social/indigo/lex/util"
 	"github.com/bluesky-social/indigo/util"
···
 		req.Header.Set("x-ratelimit-bypass", ac.RatelimitBypass)
 	}
 
+	start := time.Now()
+	defer func() {
+		duration := time.Since(start)
+		abyssAPIDuration.Observe(duration.Seconds())
+	}()
+
 	req = req.WithContext(ctx)
 	res, err := ac.Client.Do(req)
 	if err != nil {
 		return nil, fmt.Errorf("abyss request failed: %v", err)
 	}
 	defer res.Body.Close()
+
+	abyssAPICount.WithLabelValues(fmt.Sprint(res.StatusCode)).Inc()
 	if res.StatusCode != 200 {
 		return nil, fmt.Errorf("abyss request failed statusCode=%d", res.StatusCode)
 	}

automod/visual/hiveai_client.go

···
 	"log/slog"
 	"mime/multipart"
 	"net/http"
+	"time"
 
 	lexutil "github.com/bluesky-social/indigo/lex/util"
 	"github.com/bluesky-social/indigo/util"
···
 		return nil, err
 	}
 
+	start := time.Now()
+	defer func() {
+		duration := time.Since(start)
+		hiveAPIDuration.Observe(duration.Seconds())
+	}()
+
 	req.Header.Set("Authorization", fmt.Sprintf("Token %s", hal.ApiToken))
 	req.Header.Add("Content-Type", writer.FormDataContentType())
 	req.Header.Set("Accept", "application/json")
···
 		return nil, fmt.Errorf("HiveAI request failed: %v", err)
 	}
 	defer res.Body.Close()
+
+	hiveAPICount.WithLabelValues(fmt.Sprint(res.StatusCode)).Inc()
 	if res.StatusCode != 200 {
 		return nil, fmt.Errorf("HiveAI request failed  statusCode=%d", res.StatusCode)
 	}

automod/visual/metrics.go

···
+package visual
+
+import (
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promauto"
+)
+
+var hiveAPIDuration = promauto.NewHistogram(prometheus.HistogramOpts{
+	Name: "automod_hive_api_duration_sec",
+	Help: "Duration of Hive image auto-labeling API calls",
+})
+
+var hiveAPICount = promauto.NewCounterVec(prometheus.CounterOpts{
+	Name: "automod_hive_api_count",
+	Help: "Number of Hive image auto-labeling API calls, by HTTP status code",
+}, []string{"status"})
+
+var abyssAPIDuration = promauto.NewHistogram(prometheus.HistogramOpts{
+	Name: "automod_abyss_api_duration_sec",
+	Help: "Duration of abyss image scanning API call",
+})
+
+var abyssAPICount = promauto.NewCounterVec(prometheus.CounterOpts{
+	Name: "automod_abyss_api_count",
+	Help: "Number of abyss image scanning API calls, by HTTP status code",
+}, []string{"status"})