Remove obsolete web scraper module

Web scraping functionality is no longer needed. Removes:
- src/web_scraper/ directory (6 files)
- /web-scraper/scrape endpoint from tools controller
- References from health controller endpoints list

Tools controller now only contains DNS lookup functionality.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/controllers/health_controller.py

@@ -61,7 +61,7 @@ class HealthController(BaseController):
                     "chat_completions": "/v1/chat/completions",
                     "models": "/v1/models",
                     "conversations": "/v1/conversations",
-                    "web_scraper": "/web-scraper/scrape",
+                    "dns_lookup": "/tools/dns/lookup",
                     "infrastructure": "/infrastructure",
                     "health": "/health",
                     "health_full": "/health/full"