fix: Docker and import issues for CHORUS integration

- Update Dockerfile to use Go 1.23 (was 1.21)
- Add missing config package imports to executor, github integration, and sandbox modules
- These fixes enable proper build for CHORUS Services Docker integration

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

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

github/integration.go

@@ -9,6 +9,7 @@ import (
 
 	"github.com/anthonyrawlins/bzzz/executor"
 	"github.com/anthonyrawlins/bzzz/logging"
+	"github.com/anthonyrawlins/bzzz/pkg/config"
 	"github.com/anthonyrawlins/bzzz/pkg/hive"
 	"github.com/anthonyrawlins/bzzz/pkg/types"
 	"github.com/anthonyrawlins/bzzz/pubsub"