feat: synchronize access.log client IPs across nodes (#5098)

* feat: synchronize access.log client IPs across nodes for global fail2ban limits

* fix(nodes): harden cross-node client-IP merge for cluster fail2ban

MergeInboundClientIps inserted new rows with the remote node's primary key,
which collides with the independently auto-incremented local id and rolled
back the whole sync batch — breaking exactly the node-only clients the
feature targets. It also never evicted stale IPs, so the 30-minute cutoff
was defeated cluster-wide (the master pushed its unpruned table back to
nodes, which re-added IPs they had just pruned) and the blobs grew unbounded.

- drop the remote id on create (Id=0) and guard the email-unique race with
  ON CONFLICT DO NOTHING; also fixes a latent Postgres sequence collision
- apply the same 30-minute stale cutoff inside the merge and skip creating
  node-only rows whose IPs are all stale
- throttle the IP fetch/merge/push to ~10s (data only refreshes every 10s)
  instead of running on every 5s traffic tick, cutting SQLite write churn
- log the load error on the push path and tidy the merge response message
- add unit tests for the merge (remote-id, dedup, stale-drop, skips)

---------

Co-authored-by: Rqzbeh <Rqzbeh@example.com>
Co-authored-by: Sanaei <ho3ein.sanaei@gmail.com>

web/controller/server.go

@@ -9,6 +9,7 @@ import (
 	"time"
 
 	"github.com/mhsanaei/3x-ui/v3/database"
+	"github.com/mhsanaei/3x-ui/v3/database/model"
 	"github.com/mhsanaei/3x-ui/v3/logger"
 	"github.com/mhsanaei/3x-ui/v3/web/entity"
 	"github.com/mhsanaei/3x-ui/v3/web/global"
@@ -61,6 +62,7 @@ func (a *ServerController) initRouter(g *gin.RouterGroup) {
 	g.GET("/getNewmldsa65", a.getNewmldsa65)
 	g.GET("/getNewmlkem768", a.getNewmlkem768)
 	g.GET("/getNewVlessEnc", a.getNewVlessEnc)
+	g.GET("/clientIps", a.getClientIps)
 
 	g.POST("/stopXrayService", a.stopXrayService)
 	g.POST("/restartXrayService", a.restartXrayService)
@@ -72,6 +74,7 @@ func (a *ServerController) initRouter(g *gin.RouterGroup) {
 	g.POST("/xraylogs/:count", a.getXrayLogs)
 	g.POST("/importDB", a.importDB)
 	g.POST("/getNewEchCert", a.getNewEchCert)
+	g.POST("/clientIps", a.setClientIps)
 }
 
 // startTask registers the @2s ticker that refreshes server status, samples
@@ -420,3 +423,18 @@ func (a *ServerController) getNewmlkem768(c *gin.Context) {
 	}
 	jsonObj(c, out, nil)
 }
+
+func (a *ServerController) getClientIps(c *gin.Context) {
+	ips, err := (&service.InboundService{}).GetAllInboundClientIps()
+	jsonObj(c, ips, err)
+}
+
+func (a *ServerController) setClientIps(c *gin.Context) {
+	var ips []model.InboundClientIps
+	if err := c.ShouldBindJSON(&ips); err != nil {
+		jsonMsg(c, "invalid data", err)
+		return
+	}
+	err := (&service.InboundService{}).MergeInboundClientIps(ips)
+	jsonMsg(c, "Client IPs merged", err)
+}