chore(deps): update dependency go to 1.26

.github/actions/setup-go/action.yml

@@ -13,7 +13,7 @@ runs:
       uses: actions/setup-go@7a3fe6cf4cb3a834922a1244abfce67bcef6a0c5 # v6.2.0
       with:
         check-latest: true
-        go-version: "1.25"
+        go-version: "1.26"
 
     - name: Verify setup
       shell: bash

.github/workflows/golangci-lint.yml

@@ -19,4 +19,4 @@ jobs:
       - name: golangci-lint
         uses: golangci/golangci-lint-action@1e7e51e771db61008b38414a730f564565cf7c20 # v9.2.0
         with:
-          version: v2.6.2
+          version: v2.9.0

app/errors/errors.go

@@ -2,6 +2,7 @@
 
 // Package errors provides errors with structured fields and stack traces.
 // It is a drop-in replacement for stdlib errors and should be used as such throughout the app.
+// nolint:revive
 package errors
 
 import (

app/errors/go113.go

@@ -1,6 +1,6 @@
 // Copyright © 2022-2026 Obol Labs Inc. Licensed under the terms of a Business Source License 1.1
 
-//nolint:wrapcheck
+//nolint:wrapcheck,revive
 package errors
 
 import (

core/consensus/metrics/metrics.go

@@ -1,5 +1,6 @@
 // Copyright © 2022-2026 Obol Labs Inc. Licensed under the terms of a Business Source License 1.1
 
+//nolint:revive
 package metrics
 
 import (

core/tracker/inclusion.go

@@ -687,12 +687,7 @@ func (a *InclusionChecker) checkBlock(ctx context.Context, slot uint64, attDutie
 
 	block := eth2Resp.Data
 
-	var found bool
-	if block != nil {
-		found = true
-	} else {
-		found = false
-	}
+	found := block != nil
 
 	a.checkBlockFunc(ctx, slot, found)