feat: remove Conduit Matrix service

Remove all traces of the Conduit Matrix homeserver service including:
- Delete conduit-compose.yml.j2 template and conduit.yml task file
- Remove conduit from development services category
- Remove conduit Caddy reverse proxy configuration
- Remove conduit subdomain from domains.yml
- Remove conduit DNS A record from Route53
- Delete Matrix well-known files (client/server)
- Update all documentation from 25 to 24 services

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

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

README.md

@@ -10,7 +10,7 @@ The playbook manages two main environments:
 
 ## Services Deployed
 
-The Docker role deploys and manages 25 self-hosted services organized into logical categories:
+The Docker role deploys and manages 24 self-hosted services organized into logical categories:
 
 ### Infrastructure
 - **Caddy** (Reverse proxy with automatic HTTPS)
@@ -20,7 +20,6 @@ The Docker role deploys and manages 25 self-hosted services organized into logic
 ### Development
 - **Gitea** (Git repository hosting)
 - **Code Server** (VS Code in browser)
-- **Matrix Conduit** (Communication/chat)
 
 ### Media
 - **Audiobookshelf** (Audiobook server)