Fix Go module imports and add dynamic Ollama model selection with N8N integration

- Fixed module path from github.com/deepblackcloud/bzzz to github.com/anthonyrawlins/bzzz
- Added dynamic Ollama model detection via /api/tags endpoint
- Implemented intelligent model selection through N8N webhook integration
- Added BZZZ_MODEL_SELECTION_WEBHOOK environment variable support
- Fixed GitHub assignee issue by using valid username instead of peer ID
- Added comprehensive model fallback mechanisms
- Updated all import statements across the codebase
- Removed duplicate systemd service file
- Added sandbox execution environment and type definitions

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

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

bzzz.service

@@ -19,6 +19,8 @@ TimeoutStopSec=30
 # Environment variables
 Environment=HOME=/home/tony
 Environment=USER=tony
+Environment=BZZZ_HIVE_API_URL=https://hive.home.deepblack.cloud
+Environment=BZZZ_GITHUB_TOKEN_FILE=/home/tony/AI/secrets/passwords_and_tokens/gh-token
 
 # Logging
 StandardOutput=journal