Restructure: Move services from root to unified repo

Moved updated services from /home/sam/development/ root into aboutme_chat_demo/:
- knowledge_service/ (with ChromaDB, gitea_scraper, FastAPI)
- langgraph_service/ (with LangGraph agent orchestration)
- airflow/ (with DAGs for scheduled ingestion)

All services now in single repo location.
Modular docker-compose files per service maintained.
Removed duplicate nested directories.
Updated files reflect latest working versions.

knowledge_service/gitea_scraper.py

@@ -61,7 +61,6 @@ class GiteaScraper:
     
     def get_readme(self, repo_name: str) -> str:
         """Fetch README content for a repository."""
-        # Try common README filenames
         readme_names = ["README.md", "readme.md", "Readme.md", "README.rst"]
         
         for readme_name in readme_names:
@@ -113,7 +112,7 @@ if __name__ == "__main__":
     repos = scraper.get_user_repos()
     print(f"Found {len(repos)} repositories")
     
-    for repo in repos[:3]:  # Test with first 3
+    for repo in repos[:3]:
         print(f"\nRepo: {repo.name}")
         readme = scraper.get_readme(repo.name)
         if readme: