Initial commit: FunStat MCP Server Go implementation

- Telegram integration for customer statistics
- MCP server implementation with rate limiting
- Cache system for performance optimization
- Multi-language support
- RESTful API endpoints

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

internal/telegram/util.go

@@ -0,0 +1,22 @@
+package telegram
+
+import (
+	"context"
+	"time"
+)
+
+func sleepWithContext(ctx context.Context, d time.Duration) error {
+	if d <= 0 {
+		return nil
+	}
+
+	timer := time.NewTimer(d)
+	defer timer.Stop()
+
+	select {
+	case <-ctx.Done():
+		return ctx.Err()
+	case <-timer.C:
+		return nil
+	}
+}