fix(deps): pin @sasjs/utils and drop the unused jsrsasign

@sasjs/utils is imported directly across the client but was left as a caret
range in the 7.18 bump, while every other dependency in the file is exact.
Pin it to 4.0.0, which is the version the lockfile already resolves.

jsrsasign is declared but referenced nowhere in the tracked source - the only
other mentions are the lockfile entry and a historical CHANGELOG line - so
drop it.

Lockfile regenerated with npm install --package-lock-only; the only deltas are
the pinned range and the removed jsrsasign tree. 570/570 unit tests pass.

client/package-lock.json

@@ -22,7 +22,7 @@
         "@clr/ui": "file:libraries/clr-ui-17.9.0.tgz",
         "@handsontable/angular-wrapper": "18.1.1",
         "@sasjs/adapter": "5.1.0",
-        "@sasjs/utils": "^4.0.0",
+        "@sasjs/utils": "4.0.0",
         "@sheet/crypto": "file:libraries/sheet-crypto.tgz",
         "@types/d3-graphviz": "^2.6.7",
         "@types/text-encoding": "0.0.35",
@@ -40,7 +40,6 @@
         "hyperformula": "^2.5.0",
         "iconv-lite": "^0.5.0",
         "jquery-datetimepicker": "^2.5.21",
-        "jsrsasign": "11.1.1",
         "marked": "^5.0.0",
         "moment": "^2.30.1",
         "ngx-clipboard": "^16.0.0",
@@ -17559,16 +17558,6 @@
         "verror": "1.10.0"
       }
     },
-    "node_modules/jsrsasign": {
-      "version": "11.1.1",
-      "resolved": "https://registry.npmjs.org/jsrsasign/-/jsrsasign-11.1.1.tgz",
-      "integrity": "sha512-6w95OOXH8DNeGxakqLndBEqqwQ6A70zGaky1oxfg8WVLWOnghTfJsc5Tknx+Z88MHSb1bGLcqQHImOF8Lk22XA==",
-      "deprecated": "This package is no longer maintained.",
-      "license": "MIT",
-      "funding": {
-        "url": "https://github.com/kjur/jsrsasign#donations"
-      }
-    },
     "node_modules/jszip": {
       "version": "3.10.1",
       "resolved": "https://registry.npmjs.org/jszip/-/jszip-3.10.1.tgz",

client/package.json

@@ -56,7 +56,7 @@
     "@clr/ui": "file:libraries/clr-ui-17.9.0.tgz",
     "@handsontable/angular-wrapper": "18.1.1",
     "@sasjs/adapter": "5.1.0",
-    "@sasjs/utils": "^4.0.0",
+    "@sasjs/utils": "4.0.0",
     "@sheet/crypto": "file:libraries/sheet-crypto.tgz",
     "@types/d3-graphviz": "^2.6.7",
     "@types/text-encoding": "0.0.35",
@@ -74,7 +74,6 @@
     "hyperformula": "^2.5.0",
     "iconv-lite": "^0.5.0",
     "jquery-datetimepicker": "^2.5.21",
-    "jsrsasign": "11.1.1",
     "marked": "^5.0.0",
     "moment": "^2.30.1",
     "ngx-clipboard": "^16.0.0",