ddns: store configuation in database (#435)

* ddns: store configuation in database

Co-authored-by: nap0o <144927971+nap0o@users.noreply.github.com>

* feat: split domain with soa lookup

* switch to libdns interface

* ddns: add unit test

* ddns: skip TestSplitDomainSOA on ci

network is not steady

* fix error handling

* fix error handling

---------

Co-authored-by: nap0o <144927971+nap0o@users.noreply.github.com>

model/config.go

@@ -125,30 +125,6 @@ type Config struct {
 	IgnoredIPNotificationServerIDs map[uint64]bool // [ServerID] -> bool(值为true代表当前ServerID在特定服务器列表内）
 	MaxTCPPingValue                int32
 	AvgPingCount                   int
-
-	// 动态域名解析更新
-	DDNS struct {
-		Enable             bool
-		Provider           string
-		AccessID           string
-		AccessSecret       string
-		WebhookURL         string
-		WebhookMethod      string
-		WebhookRequestBody string
-		WebhookHeaders     string
-		MaxRetries         uint32
-		Profiles           map[string]DDNSProfile
-	}
-}
-
-type DDNSProfile struct {
-	Provider           string
-	AccessID           string
-	AccessSecret       string
-	WebhookURL         string
-	WebhookMethod      string
-	WebhookRequestBody string
-	WebhookHeaders     string
 }
 
 // Read 读取配置文件并应用
@@ -189,9 +165,6 @@ func (c *Config) Read(path string) error {
 	if c.AvgPingCount == 0 {
 		c.AvgPingCount = 2
 	}
-	if c.DDNS.MaxRetries == 0 {
-		c.DDNS.MaxRetries = 3
-	}
 	if c.Oauth2.OidcScopes == "" {
 		c.Oauth2.OidcScopes = "openid,profile,email"
 	}