refactor: DI fetcher, parallel node polling, 14 tests, label cardinality fixes

.github/workflows/docker.yml

@@ -4,6 +4,8 @@ on:
   push:
     tags:
       - "*"
+    branches:
+      - refactor/v2
 
 permissions: write-all
 
@@ -29,7 +31,8 @@ jobs:
           images: ghcr.io/inc4/gonka-exporter-go
           tags: |
             type=ref,event=tag
-            type=raw,value=latest
+            type=raw,value=latest,enable=${{ github.ref_type == 'tag' }}
+            type=raw,value=dev,enable=${{ github.ref_type == 'branch' }}
 
       - name: Build and push
         uses: docker/build-push-action@v5

.gitignore

@@ -1,6 +1,6 @@
 # Compiled binaries
-exporter
-gonka-exporter
+/exporter
+/gonka-exporter
 *.exe
 
 # Environment files

cmd/exporter/main.go

@@ -10,10 +10,12 @@ import (
 	"syscall"
 	"time"
 
+	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 
 	"github.com/gonka/exporter/internal/collector"
 	"github.com/gonka/exporter/internal/config"
+	"github.com/gonka/exporter/internal/fetcher"
 )
 
 func main() {
@@ -37,7 +39,7 @@ func main() {
 		slog.Warn("PARTICIPANT_ADDRESS is not set — participant metrics will be skipped")
 	}
 
-	c := collector.New(cfg)
+	c := collector.New(cfg, fetcher.NewHTTPFetcher(), prometheus.DefaultRegisterer)
 
 	mux := http.NewServeMux()
 	mux.Handle("/metrics", promhttp.Handler())