chore: Add fast-check to cli, instance-ai and editor-ui dev dependencies (no-changelog)

Property-based tests for the new pure functions run in these packages.
fast-check is already in the workspace catalog.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_018gK4jZbBjL8toMAnrfJ4mh

packages/@n8n/instance-ai/package.json

@@ -106,6 +106,7 @@
     "@types/psl": "1.1.3",
     "@types/turndown": "catalog:",
     "@vitest/coverage-v8": "catalog:",
+    "fast-check": "catalog:",
     "fast-glob": "catalog:",
     "p-limit": "catalog:p-limit-v7",
     "playwright-core": "catalog:",

packages/cli/package.json

@@ -110,6 +110,7 @@
     "axios": "catalog:",
     "concurrently": "^8.2.0",
     "esbuild": "catalog:",
+    "fast-check": "catalog:",
     "form-data": "catalog:",
     "minifaker": "1.34.1",
     "mjml": "^4.15.3",

packages/frontend/editor-ui/package.json

@@ -127,6 +127,7 @@
     "eslint-plugin-oxlint": "catalog:",
     "esprima-next": "5.8.4",
     "fake-indexeddb": "^6.0.0",
+    "fast-check": "catalog:",
     "fast-json-stable-stringify": "^2.1.0",
     "file-saver": "^2.0.2",
     "flatted": "catalog:",

pnpm-lock.yaml

@@ -3233,6 +3233,9 @@ importers:
       '@vitest/coverage-v8':
         specifier: 'catalog:'
         version: 5.0.1(@vitest/browser@5.0.1)(vitest@5.0.1)
+      fast-check:
+        specifier: 'catalog:'
+        version: 3.23.2
       fast-glob:
         specifier: 'catalog:'
         version: 3.3.3
@@ -5309,6 +5312,9 @@ importers:
       esbuild:
         specifier: ^0.28.1
         version: 0.28.1
+      fast-check:
+        specifier: 'catalog:'
+        version: 3.23.2
       form-data:
         specifier: 4.0.6
         version: 4.0.6
@@ -6865,6 +6871,9 @@ importers:
       fake-indexeddb:
         specifier: ^6.0.0
         version: 6.0.0
+      fast-check:
+        specifier: 'catalog:'
+        version: 3.23.2
       fast-json-stable-stringify:
         specifier: ^2.1.0
         version: 2.1.0