fix: take care of changed belen_conf keys (#758)

## ℹ️ Description
This PR takes care of the changed belen_conf dictionary.
So extracting special attributes and third category will work again.

- Link to the related issue(s): Issue #757


## 📋 Changes Summary

- changed belen_conf keys from "dimension108" to "ad_attributes" and
"dimension92" to "l3_category_id"

### ⚙️ Type of Change
Select the type(s) of change(s) included in this pull request:
- [x] 🐞 Bug fix (non-breaking change which fixes an issue)
- [ ] ✨ New feature (adds new functionality without breaking existing
usage)
- [ ] 💥 Breaking change (changes that might break existing user setups,
scripts, or configurations)


## ✅ Checklist
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- [x] I have reviewed my changes to ensure they meet the project's
standards.
- [x] I have tested my changes and ensured that all tests pass (`pdm run
test`).
- [x] I have formatted the code (`pdm run format`).
- [x] I have verified that linting passes (`pdm run lint`).
- [x] I have updated documentation where necessary.

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<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Chores**
* Updated internal data extraction sources for category and attribute
information to align with current analytics configuration.
  * Updated test suite to reflect configuration changes.

<sub>✏️ Tip: You can customize this high-level summary in your review
settings.</sub>

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Co-authored-by: Jens <1742418+1cu@users.noreply.github.com>

src/kleinanzeigen_bot/extract.py

@@ -325,10 +325,10 @@ class AdExtractor(WebScrapingMixin):
         info["category"] = await self._extract_category_from_ad_page()
 
         # append subcategory and change e.g. category "161/172" to "161/172/lautsprecher_kopfhoerer"
-        # take subcategory from dimension92 as key 'art_s' sometimes is a special attribute (e.g. gender for clothes)
+        # take subcategory from third_category_name as key 'art_s' sometimes is a special attribute (e.g. gender for clothes)
         # the subcategory isn't really necessary, but when set, the appropriate special attribute gets preselected
-        if dimension92 := belen_conf["universalAnalyticsOpts"]["dimensions"].get("dimension92"):
-            info["category"] += f"/{dimension92}"
+        if third_category_id := belen_conf["universalAnalyticsOpts"]["dimensions"].get("l3_category_id"):
+            info["category"] += f"/{third_category_id}"
 
         info["title"] = title
 
@@ -498,7 +498,7 @@ class AdExtractor(WebScrapingMixin):
         """
 
         # e.g. "art_s:lautsprecher_kopfhoerer|condition_s:like_new|versand_s:t"
-        special_attributes_str = belen_conf["universalAnalyticsOpts"]["dimensions"].get("dimension108")
+        special_attributes_str = belen_conf["universalAnalyticsOpts"]["dimensions"].get("ad_attributes")
         if not special_attributes_str:
             return {}
         special_attributes = dict(item.split(":") for item in special_attributes_str.split("|") if ":" in item)