[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/export.go

@@ -11,7 +11,6 @@ import (
 
 	"github.com/mattermost/mattermost/server/public/model"
 	"github.com/mattermost/mattermost/server/public/shared/mlog"
-	"github.com/mattermost/mattermost/server/v8/channels/audit"
 )
 
 func (api *API) InitExport() {
@@ -45,9 +44,9 @@ func listExports(c *Context, w http.ResponseWriter, r *http.Request) {
 }
 
 func deleteExport(c *Context, w http.ResponseWriter, r *http.Request) {
-	auditRec := c.MakeAuditRecord("deleteExport", audit.Fail)
+	auditRec := c.MakeAuditRecord("deleteExport", model.AuditStatusFail)
 	defer c.LogAuditRec(auditRec)
-	audit.AddEventParameter(auditRec, "export_name", c.Params.ExportName)
+	model.AddEventParameterToAuditRec(auditRec, "export_name", c.Params.ExportName)
 
 	if !c.IsSystemAdmin() {
 		c.SetPermissionError(model.PermissionManageSystem)
@@ -90,10 +89,10 @@ func downloadExport(c *Context, w http.ResponseWriter, r *http.Request) {
 }
 
 func generatePresignURLExport(c *Context, w http.ResponseWriter, r *http.Request) {
-	auditRec := c.MakeAuditRecord("generatePresignURLExport", audit.Fail)
+	auditRec := c.MakeAuditRecord("generatePresignURLExport", model.AuditStatusFail)
 	defer c.LogAuditRec(auditRec)
 
-	audit.AddEventParameter(auditRec, "export_name", c.Params.ExportName)
+	model.AddEventParameterToAuditRec(auditRec, "export_name", c.Params.ExportName)
 
 	if !c.IsSystemAdmin() {
 		c.SetPermissionError(model.PermissionManageSystem)