feat: Phase 1 - Core API server with authentication

- Added database schema for users, api_keys, sync_state, change_log, and sync_config
- Implemented API key generation and validation with bcrypt hashing
- Created Chi-based REST API server with endpoints for:
  - Task CRUD operations (create, read, update, delete)
  - Task actions (complete, start, stop)
  - Tag management (list, add, remove)
  - Projects listing
  - Health check endpoint
- Added middleware for authentication and CORS
- Implemented change log tracking with triggers (key:value format)
- Added configurable change log retention (default 30 days)
- Created server CLI commands (opal server start, opal server keygen)
- Dependencies added: golang.org/x/crypto/bcrypt, github.com/go-chi/chi/v5

opal-task/cmd/root.go

@@ -25,7 +25,7 @@ const parsedArgsKey contextKey = "parsedArgs"
 var commandNames = []string{
 	"add", "list", "done", "modify", "delete",
 	"start", "stop", "count", "projects", "tags",
-	"info", "edit",
+	"info", "edit", "server",
 }
 
 var commandsWithModifiers = map[string]bool{