feat: Build Paperclip from source instead of published image

- Create playbooks/build_paperclip_image.yml to build image locally from repo
- Clone/update paperclipai/paperclip main branch on deploy host
- Build with --target production for lean, current, self-managed image
- Update docker-compose to use paperclip-local:latest instead of reeoss image
- Gives full control over Paperclip version and dependency updates
- OpenCode v1.2.24 local adapter pre-installed in source build
- Enables rapid iteration and custom patches on Paperclip platform

Deployment flow:
1. ansible-playbook playbooks/build_paperclip_image.yml  # Build from source
2. ansible-playbook playbooks/deploy_paperclip_stack.yml # Deploy with local image

ansible/roles/paperclip-docker/templates/docker-compose.yml.j2

@@ -17,7 +17,7 @@ services:
       retries: 5
 
   paperclip:
-    image: reeoss/paperclipai-paperclip:latest
+    image: paperclip-local:latest
     container_name: paperclip
     network_mode: host
     env_file: