Fix module paths for GitHub repository structure

- Update go.mod files to use github.com/Fimeg/RedFlag module path
- Fix all import statements across server and agent code
- Resolves build errors when cloning from GitHub
- Utils package (version comparison) is actually needed and working

aggregator-server/internal/api/handlers/updates.go

@@ -7,8 +7,8 @@ import (
 	"strconv"
 	"time"
 
-	"github.com/aggregator-project/aggregator-server/internal/database/queries"
-	"github.com/aggregator-project/aggregator-server/internal/models"
+	"github.com/Fimeg/RedFlag/aggregator-server/internal/database/queries"
+	"github.com/Fimeg/RedFlag/aggregator-server/internal/models"
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
 )