[MM-64686] Expose audit logging functionality via plugin API (#31204)

This commit exposes audit logging functionality to plugins via the plugin API, allowing plugins to create and log audit records. Additionally, it addresses a gob encoding issue that could cause plugin crashes when audit data contains nil pointers or unregistered types.

server/channels/api4/preference.go

@@ -9,7 +9,6 @@ import (
 
 	"github.com/mattermost/mattermost/server/public/model"
 	"github.com/mattermost/mattermost/server/public/shared/mlog"
-	"github.com/mattermost/mattermost/server/v8/channels/audit"
 )
 
 const maxUpdatePreferences = 100
@@ -94,7 +93,7 @@ func updatePreferences(c *Context, w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	auditRec := c.MakeAuditRecord("updatePreferences", audit.Fail)
+	auditRec := c.MakeAuditRecord("updatePreferences", model.AuditStatusFail)
 	defer c.LogAuditRec(auditRec)
 
 	if !c.App.SessionHasPermissionToUser(*c.AppContext.Session(), c.Params.UserId) {
@@ -156,7 +155,7 @@ func deletePreferences(c *Context, w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	auditRec := c.MakeAuditRecord("deletePreferences", audit.Fail)
+	auditRec := c.MakeAuditRecord("deletePreferences", model.AuditStatusFail)
 	defer c.LogAuditRec(auditRec)
 
 	if !c.App.SessionHasPermissionToUser(*c.AppContext.Session(), c.Params.UserId) {