feat: add authentication and database middleware

- Add JWT authentication middleware for protected routes
- Add database middleware for request-scoped database access
- Include proper error handling and response formatting
- Support for role-based access control

middlewares/database.go

@@ -0,0 +1,29 @@
+package middlewares
+
+import (
+	"git.secnex.io/secnex/idp-api/db"
+	"github.com/gofiber/fiber/v2"
+	"gorm.io/gorm"
+)
+
+// DatabaseMiddleware injects the database connection into the fiber context
+func DatabaseMiddleware() fiber.Handler {
+	return func(c *fiber.Ctx) error {
+		// Get the global database instance
+		database := db.GetDB()
+
+		// Store the database connection in the context
+		c.Locals("db", database)
+
+		return c.Next()
+	}
+}
+
+// GetDBFromContext retrieves the database connection from the fiber context
+func GetDBFromContext(c *fiber.Ctx) *gorm.DB {
+	if db, ok := c.Locals("db").(*gorm.DB); ok {
+		return db
+	}
+	// Fallback to global instance if not found in context
+	return db.GetDB()
+}