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 93.07%. Comparing base (3ed1a48) to head (4687448).
⚠️ Report is 6 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1182      +/-   ##
==========================================
+ Coverage   93.05%   93.07%   +0.01%     
==========================================
  Files          54       54              
  Lines        3671     3680       +9     
==========================================
+ Hits         3416     3425       +9     
  Misses        255      255              

Flag	Coverage Δ
e2e	31.65% <ø> (-0.08%)	⬇️
integration	51.73% <ø> (+0.03%)	⬆️
unit	89.83% <ø> (+0.05%)	⬆️

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