feat: add audit proto files

proto/admin/audit.proto

@@ -0,0 +1,37 @@
+syntax = "proto3";
+
+package audit.v1;
+
+option go_package = "git.lendry.ru/lendry-erp/proto.git/go;pb";
+
+service AuditService {
+  rpc GetAuditLogs(GetAuditLogsRequest) returns (GetAuditLogsResponse);
+}
+
+message GetAuditLogsRequest {
+  optional string account_id = 1;
+  optional string type = 2;
+  optional string action = 3;
+  optional string start_date = 4; // ISO string
+  optional string end_date = 5;   // ISO string
+  int32 page = 6;
+  int32 limit = 7;
+}
+
+message AuditLogItem {
+  string id = 1;
+  string account_id = 2;
+  string type = 3;
+  string action = 4;
+  string ip_address = 5;
+  string user_agent = 6;
+  string detail = 7;
+  string created_at = 8;
+}
+
+message GetAuditLogsResponse {
+  repeated AuditLogItem logs = 1;
+  int32 total = 2;
+  int32 page = 3;
+  int32 total_pages = 4;
+}