ci: add the apify-factory review workflow

[apify-factory]

Lets apify-factory review pull requests here and approve the trivial ones.

• Requesting apify-factory as a reviewer runs an AI review; when every gate passes, the review finds nothing and a second model agrees, it approves instead of commenting.
• A push that changes the code, removing the request, or going back to draft withdraws the bot's own approval.
• This repository's factory_auto_approve property is true, which is what allows approvals, and mtrunkat becomes the code owner of the workflow file.
• These paths are never auto-approved here, on top of the defaults every repository has. An agent proposed them from the repository's layout; edit the list in the workflow like any other code.

Path	Why	Files
src/apify/_charging.py	Pay-per-event ChargingManager that computes and submits charges to users against pricing info; any change can alter what customers are billed.	1
src/apify/_crypto.py	RSA/AES encryption, private-key loading, secret-input decryption and HMAC signing; subtle changes can leak secrets or break cryptographic guarantees.	1
.rules.md	Instruction file for coding agents (duplicate of CLAUDE.md) that steers automated contributors; changes to agent guidance need human review.	1

Refs https://github.com/apify/ai-developer/blob/main/actions/auto-approve/README.md

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.05%. Comparing base (3ed1a48) to head (04bb06d).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1182   +/-   ##
=======================================
  Coverage   93.05%   93.05%           
=======================================
  Files          54       54           
  Lines        3671     3671           
=======================================
  Hits         3416     3416           
  Misses        255      255           

Flag	Coverage Δ
e2e	31.73% <ø> (ø)
integration	51.70% <ø> (ø)
unit	89.78% <ø> (ø)

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