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>

test/task_simulator.go

@@ -7,7 +7,7 @@ import (
 	"math/rand"
 	"time"
 
-	"github.com/deepblackcloud/bzzz/pubsub"
+	"github.com/anthonyrawlins/bzzz/pubsub"
 )
 
 // TaskSimulator generates realistic task scenarios for testing antennae coordination
@@ -287,7 +287,7 @@ func generateMockRepositories() []MockRepository {
 		{
 			Owner: "deepblackcloud",
 			Name:  "bzzz",
-			URL:   "https://github.com/deepblackcloud/bzzz",
+			URL:   "https://github.com/anthonyrawlins/bzzz",
 			Dependencies: []string{"hive"},
 			Tasks: []MockTask{
 				{