Fix/scrape empty fields

[HC-ONLINE]

Description
Fix scrape results returning empty data for content_type, headers, cookies, links, images, forms, and scripts. The core scrapers (static and dynamic) were not capturing HTTP response metadata or extracting HTML elements, and the service layer hardcoded all these fields to empty defaults ("", {}, []).
Changes:

• core/scraping/static.py: Extended ScrapeResult dataclass with 8 new fields (content_type, headers, cookies, title, links, images, forms, scripts). Updated scrape() to capture HTTP response headers, cookies, content-type, and extract title/links/images/forms/scripts from parsed HTML.
• core/scraping/dynamic.py: Extended DynamicScrapeResult with 5 new fields. Updated scrape() to extract title/links/images/forms/scripts from Playwright-rendered HTML.
• core/scraping/extractor.py: Added extract_forms() and extract_scripts() functions (forms extracts action/method/fields; scripts extracts src/type/attributes).
• core/scraping/init.py: Exported the 2 new extraction functions.
• services/scrape_service.py: Updated _scrape_static() and _scrape_dynamic() to populate all fields from core results instead of hardcoding empty defaults. Converts core dicts to export Pydantic models (LinkInfo, ImageInfo, FormInfo, ScriptInfo).
  Related Issue
  Addresses scrape data incompleteness: content_type always empty, headers/cookies always {}, links/images/forms/scripts always [].
  Type of Change
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
  Checklist
• I have followed the style guidelines of this project (Ruff & Pyright)
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have updated the documentation accordingly
  Verification
• ruff check — 0 errors
• pyright — 0 errors
• pytest tests/unit/ — 748/748 passed