fix(git): report Git operation statistics at end of run

[jamietanna]

Changes

Now we have instrumented our Git operations with tracing, we can make
sure that users who are not using OpenTelemetry still get insights into
their Git operation usage using a debug log output.

Following how other insights are produced, we can introduce a new type
in lib/util/stats for GitOperationStats, which will track the
overall execution for each operation type, and output them in the same
style as we use for other timing reports.

At the end of a Renovate run, we'll then make sure that this is logged
into a debug log for further investigation.

To create the report, we can make sure that we introduce a new
OpenTelemetry SpanProcessor, which will run when we end our Run, and
store any Git operations in GitOperationStats.

Context

Please select one of the below:

• This closes an existing Issue: #
• This doesn't close an Issue, but I accept the risk that this PR may be closed if maintainers disagree with its opening or implementation

AI assistance disclosure

Did you use AI tools to create any part of this pull request?

Please select one option and, if yes, briefly describe how AI was used (e.g., code, tests, docs) and which tool(s) you used.

• No — I did not use AI for this contribution.
• Yes — minimal assistance (e.g., IDE autocomplete, small code completions, grammar fixes).
• Yes — substantive assistance (AI generated non‑trivial portions of code, tests, or documentation).
• Yes — other (please describe):

Documentation (please check one with an [x])

• I have updated the documentation, or
• No documentation update is required

How I've tested my work (please select one)

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository

The public repository:

Evidence

When tested with:

/**
 * @typedef {import('renovate/dist/config/types').AllConfig} AllConfig
 */

const fs = require('fs')

/** @type {AllConfig} */
let config = {
  onboarding: false,
  requireConfig: 'ignored',

  // branchConcurrentLimit: 100,
  // prConcurrentLimit: 100,
  // // make sure that **??**
  // prHourlyLimit: 1000,

  extends: ['config:best-practices'],
  logLevelRemap: [
    {
      matchMessage: "/Git operations statistics/",
      "newLogLevel": "info"
    },
  ]
}

module.exports = config;

With:

env npm run compile:ts && env OTEL_EXPORTER_OTLP_ENDPOINT=http://localhost:4318 node ../dist/renovate.js --token $(gh auth token) $repo --dry-run=full 

backstage/backstage

A large repository, with many possible branches, let's see how long it takes to run.

 INFO: Git operations statistics (repository=backstage/backstage)
       "other": {
         "count": 29,
         "avgMs": 36,
         "medianMs": 17.72544,
         "maxMs": 359.779328,
         "totalMs": 1032
       },
       "clone": {
         "count": 1,
         "avgMs": 32537,
         "medianMs": 32537.324032,
         "maxMs": 32537.324032,
         "totalMs": 32538
       },
       "checkout": {
         "count": 1,
         "avgMs": 194,
         "medianMs": 194.338048,
         "maxMs": 194.338048,
         "totalMs": 195
       },
       "reset": {
         "count": 1,
         "avgMs": 152,
         "medianMs": 152.2048,
         "maxMs": 152.2048,
         "totalMs": 153
       },
       "oldLevel": "debug",
       "trace_id": "5c81f7938635a648ad360eef90fa7b77",
       "span_id": "ba9b6e3aa9976d0c",
       "trace_flags": "01"

JamieTanna-Mend-testing/elastic-poetry-1-forced-csp-security-policies (fork of https://github.com/elastic/csp-security-policies/)

A smaller repository, where we'd need to invoke poetry (although not tested in dry-run mode)

 INFO: Git operations statistics (repository=JamieTanna-Mend-testing/elastic-poetry-1-forced-csp-security-policies)
       "other": {
         "count": 93,
         "avgMs": 18,
         "medianMs": 12.624896,
         "maxMs": 358.847232,
         "totalMs": 1695
       },
       "clone": {
         "count": 1,
         "avgMs": 1250,
         "medianMs": 1249.728768,
         "maxMs": 1249.728768,
         "totalMs": 1250
       },
       "checkout": {
         "count": 23,
         "avgMs": 26,
         "medianMs": 25.03808,
         "maxMs": 114.301184,
         "totalMs": 595
       },
       "reset": {
         "count": 33,
         "avgMs": 18,
         "medianMs": 16.93696,
         "maxMs": 31.168256,
         "totalMs": 593
       },
       "merge": {
         "count": 20,
         "avgMs": 230,
         "medianMs": 349.608448,
         "maxMs": 443.538432,
         "totalMs": 4608
       },
       "oldLevel": "debug",
       "trace_id": "3d152da3d3ab4b97b4ae90b410cea4ef",
       "span_id": "e1ee2ef83ffdb686",
       "trace_flags": "01"

[jamietanna]

Let's get #39653 in first

[github-actions]

🎉 This PR is included in version 42.29.3 🎉

The release is available on:

• GitHub release
• 42.29.3

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