Added fuzzy finder to search, made sync check as middleware, .id file is never used

internal/server/middleware/sync_check.go

@@ -0,0 +1,22 @@
+package middleware
+
+import (
+	"music-server/internal/backend"
+	"music-server/internal/logging"
+	"net/http"
+
+	"github.com/labstack/echo/v5"
+)
+
+// SyncCheckMiddleware blocks requests when syncing is in progress.
+// It returns HTTP 423 Locked with a standard message.
+// This middleware should be applied to handlers that cannot execute during sync.
+func SyncCheckMiddleware(next echo.HandlerFunc) echo.HandlerFunc {
+	return func(c *echo.Context) error {
+		if backend.Syncing {
+			logging.GetLogger().Info("Syncing is in progress - request blocked")
+			return c.JSON(http.StatusLocked, "Syncing is in progress")
+		}
+		return next(c)
+	}
+}