fix(vault): add pagination support to audit log

Replace manual page/pageSize data with proper Pager object in audit handler. Add CreatedUnix and UsedCount fields to Token service struct to support complete token metadata.

services/vault/vault.go

@@ -99,8 +99,10 @@ type Token struct {
 	RepoID       int64
 	Description  string
 	Scope        string
+	CreatedUnix  int64
 	ExpiresUnix  int64
 	LastUsedUnix int64
+	UsedCount    int64
 	IsRevoked    bool
 	IsExpired    bool
 }