test(e2e): add Ginkgo skipped-spec summary report

Add a ReportAfterSuite node that prints one consolidated block at the end
of the e2e run listing every skipped spec and its reason. Programmatic
Skip() reasons come from Failure.Message; label-filtered specs get a
distinct "(filtered: ...)" marker. Purely informational; never fails the
suite.

Signed-off-by: Giulio Calzolari <gcalzolari@nvidia.com>

Author: giuliocalzo

tests/e2e/go/report_skips_test.go

@@ -0,0 +1,50 @@
+//go:build e2e
+
+// Copyright 2026 NVIDIA CORPORATION
+// SPDX-License-Identifier: Apache-2.0
+
+package e2e
+
+import (
+	"fmt"
+	"strings"
+
+	. "github.com/onsi/ginkgo/v2"
+	"github.com/onsi/ginkgo/v2/types"
+)
+
+// ReportAfterSuite prints a single, easy-to-find summary of every skipped spec
+// and its reason. Ginkgo scatters per-spec `S` markers through the verbose
+// multi-profile log; this consolidates them so it is obvious at a glance what
+// was skipped and why. It is purely informational and never fails the suite.
+var _ = ReportAfterSuite("skipped specs summary", func(report Report) {
+	// ReportAfterSuite runs once, but guard anyway so parallel runners never
+	// emit the block twice.
+	if GinkgoParallelProcess() != 1 {
+		return
+	}
+
+	var lines []string
+	for _, spec := range report.SpecReports {
+		if spec.State != types.SpecStateSkipped {
+			continue
+		}
+		reason := strings.TrimSpace(spec.Failure.Message)
+		if reason == "" {
+			reason = "(filtered: did not match label filter)"
+		}
+		lines = append(lines, fmt.Sprintf("- %s\n    reason: %s", spec.FullText(), reason))
+	}
+
+	var b strings.Builder
+	fmt.Fprintf(&b, "\n========== SKIPPED SPECS (%d) ==========\n", len(lines))
+	if len(lines) == 0 {
+		b.WriteString("No specs skipped.\n")
+	} else {
+		b.WriteString(strings.Join(lines, "\n"))
+		b.WriteString("\n")
+	}
+	b.WriteString("=======================================\n")
+
+	fmt.Fprint(GinkgoWriter, b.String())
+})