fix: various fixes, updates, polyfill and logging improvement

__tests__/__snapshots__/main.test.ts.snap

@@ -3,7 +3,7 @@
 exports[`code-pushup action pull request event should compare reports 1`] = `
 "# Code PushUp
 
-🥳 Code PushUp report has **improved** – compared target commit \`<commit-sha>\` with source commit \`<commit-sha>\`.
+🥳 Code PushUp report has **improved** – compared current commit \`<commit-sha>\` with previous commit \`<commit-sha>\`.
 
 <details>
 <summary>👍 <strong>1</strong> audit improved</summary>

__tests__/main.test.ts

@@ -2,6 +2,7 @@ import type { ArtifactClient } from '@actions/artifact'
 import core from '@actions/core'
 import github from '@actions/github'
 import { jest } from '@jest/globals'
+import type { Report } from '@code-pushup/models'
 import type { components } from '@octokit/openapi-types'
 import type { RestEndpointMethodTypes } from '@octokit/plugin-rest-endpoint-methods'
 import {
@@ -113,6 +114,8 @@ describe('code-pushup action', () => {
     await git.init()
     await git.addConfig('user.name', 'John Doe')
     await git.addConfig('user.email', 'john.doe@example.com')
+    await git.addConfig('commit.gpgSign', 'false')
+    await git.addConfig('tag.gpgSign', 'false')
     await git.branch(['-M', 'main'])
 
     await git.add('index.js')