feat: cleanup unused code and enhance documentation for v0.7.1

- Remove unused StealthConfig from browser_manager.py
- Update LinkPreviewConfig import path in __init__.py and examples
- Fix infinity handling in content_scraping_strategy.py (use 0 instead of float('inf'))
- Remove sanitize_json_data functions from API endpoints
- Add comprehensive C4A Script documentation to release notes
- Update v0.7.0 release notes with improved code examples
- Create v0.7.1 release notes focusing on cleanup and documentation improvements
- Update demo files with corrected import paths and examples
- Fix virtual scroll and adaptive crawling examples across documentation

🤖 Generated with Claude Code

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

deploy/docker/api.py

@@ -54,27 +54,6 @@ def _get_memory_mb():
         logger.warning(f"Could not get memory info: {e}")
         return None
 
-# --- Helper to sanitize JSON data ---
-def sanitize_json_data(data):
-    """
-    Recursively sanitize data to handle infinity and NaN values that are not JSON compliant.
-    """
-    import math
-    
-    if isinstance(data, dict):
-        return {k: sanitize_json_data(v) for k, v in data.items()}
-    elif isinstance(data, list):
-        return [sanitize_json_data(item) for item in data]
-    elif isinstance(data, float):
-        if math.isinf(data):
-            return "Infinity" if data > 0 else "-Infinity"
-        elif math.isnan(data):
-            return "NaN"
-        else:
-            return data
-    else:
-        return data
-
 
 async def handle_llm_qa(
     url: str,
@@ -392,10 +371,8 @@ async def stream_results(crawler: AsyncWebCrawler, results_gen: AsyncGenerator)
                 server_memory_mb = _get_memory_mb()
                 result_dict = result.model_dump()
                 result_dict['server_memory_mb'] = server_memory_mb
-                # Sanitize data to handle infinity values
-                sanitized_dict = sanitize_json_data(result_dict)
-                logger.info(f"Streaming result for {sanitized_dict.get('url', 'unknown')}")
-                data = json.dumps(sanitized_dict, default=datetime_handler) + "\n"
+                logger.info(f"Streaming result for {result_dict.get('url', 'unknown')}")
+                data = json.dumps(result_dict, default=datetime_handler) + "\n"
                 yield data.encode('utf-8')
             except Exception as e:
                 logger.error(f"Serialization error: {e}")
@@ -469,7 +446,7 @@ async def handle_crawl_request(
                               
         return {
             "success": True,
-            "results": [sanitize_json_data(result.model_dump()) for result in results],
+            "results": [result.model_dump() for result in results],
             "server_processing_time_s": end_time - start_time,
             "server_memory_delta_mb": mem_delta_mb,
             "server_peak_memory_mb": peak_mem_mb