refactor: extract models/routes and env-based server config

- Move API request/response structs into new lib/models package
- Centralize Gin route registration in lib/routing to simplify wiring
- Add lib/server config helper to allow WARPBOX_BOX_POLL_INTERVAL_MS override
- Improves modularity and makes polling behavior configurable per environmentrefactor: extract models/routes and env-based server config

- Move API request/response structs into new lib/models package
- Centralize Gin route registration in lib/routing to simplify wiring
- Add lib/server config helper to allow WARPBOX_BOX_POLL_INTERVAL_MS override
- Improves modularity and makes polling behavior configurable per environment

lib/server/config.go

@@ -0,0 +1,20 @@
+package server
+
+import (
+	"os"
+	"strconv"
+)
+
+func boxPollingIntervalMS() int {
+	rawValue := os.Getenv("WARPBOX_BOX_POLL_INTERVAL_MS")
+	if rawValue == "" {
+		return boxPollInterval
+	}
+
+	interval, err := strconv.Atoi(rawValue)
+	if err != nil || interval < 1000 {
+		return boxPollInterval
+	}
+
+	return interval
+}