chore: bump version to 1.1.39 and add changelog entry

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: gustavolira

docs/changelog.md

@@ -2,7 +2,13 @@
 
 All notable changes to this project will be documented in this file.
 
-## [1.1.38] - Current
+## [1.1.39] - Current
+
+### Added
+
+- **E2E coverage collection auto-fixture**: New `_coverageCollector` automatic fixture collects Istanbul coverage (`window.__coverage__`) from the browser after each test and writes per-test JSON files to `<outputDir>/coverage/`. Enabled via `E2E_COLLECT_COVERAGE=1`. Zero overhead when disabled — no `page.evaluate` call or fs operations. Designed for use with instrumented dynamic plugin builds (nyc instrument).
+
+## [1.1.38]
 
 ### Added
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@red-hat-developer-hub/e2e-test-utils",
-  "version": "1.1.38",
+  "version": "1.1.39",
   "description": "Test utilities for RHDH E2E tests",
   "license": "Apache-2.0",
   "repository": {