feat: init mirror-proxy project

- Docker Hub / GHCR / GitHub reverse proxy
- Web admin panel with link management
- Dynamic admin path, user and password config
- Rate limiting per link (dual/single auth mode)
- Docker and docker-compose deployment support
- GitHub Actions workflow for auto-publish to GHCR

internal/models/models.go

@@ -0,0 +1,28 @@
+package models
+
+import "time"
+
+type ProxyRequest struct {
+	ID        string    `json:"id"`
+	LinkID    string    `json:"link_id"`
+	URL       string    `json:"url"`
+	Method    string    `json:"method"`
+	Status    int       `json:"status"`
+	Bytes     int64     `json:"bytes"`
+	Duration  int64     `json:"duration_ms"`
+	ClientIP  string    `json:"client_ip"`
+	CreatedAt time.Time `json:"created_at"`
+}
+
+type Stats struct {
+	TotalRequests int64            `json:"total_requests"`
+	TotalBytes    int64            `json:"total_bytes"`
+	LinkStats     map[string]*LinkStat `json:"link_stats"`
+}
+
+type LinkStat struct {
+	LinkID        string `json:"link_id"`
+	RequestCount  int64  `json:"request_count"`
+	BytesTransferred int64 `json:"bytes_transferred"`
+	LastAccess    int64  `json:"last_access"`
+}