[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/config_local.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"
 	"github.com/mattermost/mattermost/server/v8/channels/utils"
 	"github.com/mattermost/mattermost/server/v8/config"
 )
@@ -26,7 +25,7 @@ func (api *API) InitConfigLocal() {
 }
 
 func localGetConfig(c *Context, w http.ResponseWriter, r *http.Request) {
-	auditRec := c.MakeAuditRecord("localGetConfig", audit.Fail)
+	auditRec := c.MakeAuditRecord("localGetConfig", model.AuditStatusFail)
 	defer c.LogAuditRec(auditRec)
 	filterMasked, _ := strconv.ParseBool(r.URL.Query().Get("remove_masked"))
 	filterDefaults, _ := strconv.ParseBool(r.URL.Query().Get("remove_defaults"))
@@ -58,7 +57,7 @@ func localUpdateConfig(c *Context, w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	auditRec := c.MakeAuditRecord("localUpdateConfig", audit.Fail)
+	auditRec := c.MakeAuditRecord("localUpdateConfig", model.AuditStatusFail)
 	defer c.LogAuditRec(auditRec)
 
 	cfg.SetDefaults()
@@ -111,7 +110,7 @@ func localPatchConfig(c *Context, w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	auditRec := c.MakeAuditRecord("localPatchConfig", audit.Fail)
+	auditRec := c.MakeAuditRecord("localPatchConfig", model.AuditStatusFail)
 	defer c.LogAuditRec(auditRec)
 
 	appCfg := c.App.Config()
@@ -172,7 +171,7 @@ func localMigrateConfig(c *Context, w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	auditRec := c.MakeAuditRecord("migrateConfig", audit.Fail)
+	auditRec := c.MakeAuditRecord("migrateConfig", model.AuditStatusFail)
 	defer c.LogAuditRec(auditRec)
 
 	if !c.App.SessionHasPermissionTo(*c.AppContext.Session(), model.PermissionManageSystem) {
@@ -191,7 +190,7 @@ func localMigrateConfig(c *Context, w http.ResponseWriter, r *http.Request) {
 }
 
 func localGetClientConfig(c *Context, w http.ResponseWriter, r *http.Request) {
-	auditRec := c.MakeAuditRecord("localGetClientConfig", audit.Fail)
+	auditRec := c.MakeAuditRecord("localGetClientConfig", model.AuditStatusFail)
 	defer c.LogAuditRec(auditRec)
 
 	format := r.URL.Query().Get("format")