feat(testing): add end-to-end HTML scraping and parsing tests with typed parsers

- Add smart httpx MockTransport routing based on endpoint paths
- Render HTML fixtures via Jinja templates populated from JSON data
- Introduce explicit, typed HTML parsers for semantic and table-based content
- Add end-to-end tests covering scraper → content → parser → Pydantic models
- Enforce explicit output contracts and avoid default dict-based parsing

requirements.txt

@@ -1,6 +1,7 @@
 httpx==0.27.0
 beautifulsoup4==4.12.0
 pydantic==2.12.3
+jinja2==3.1.6
 # lxml==5.2.0
 
 pytest==7.4.0