Reduce low risk duplication (#79)

* clean up helpers

* shared in it's own top level folder

* workspaces setup

* build fix

* disable workspaces?

* run ci

* rename job-flow to gradcracker

* optional dependencies

* formatting?

* more optional modules

* allow post install runs

* node bump

* remove post install

* add optionals

* add more

* formatting

* comments, but im unsure

* run typescript DIRECTLY

* better build

* camoufox simplification

* lint

* build process doesn't exist

* build fix

* lockfile

* type check everything, build only for client

* rename steps correctly

* import from package!

* fix formatting

* don't fetch twice

* fix concern

extractors/ukvisajobs/src/main.ts

@@ -1,4 +1,4 @@
-/**
+/**
  * UK Visa Jobs Extractor
  *
  * Fetches job listings from my.ukvisajobs.com that may sponsor work visas.
@@ -16,6 +16,10 @@
 import { mkdir, readFile, writeFile } from "node:fs/promises";
 import { dirname, join } from "node:path";
 import { fileURLToPath } from "node:url";
+import {
+  toNumberOrNull,
+  toStringOrNull,
+} from "job-ops-shared/utils/type-conversion";
 import type { Request } from "playwright";
 
 const __dirname = dirname(fileURLToPath(import.meta.url));
@@ -103,29 +107,6 @@ class UkVisaJobsAuthError extends Error {
   }
 }
 
-function toStringOrNull(value: unknown): string | null {
-  if (value === null || value === undefined) return null;
-  if (typeof value === "string") {
-    const trimmed = value.trim();
-    return trimmed.length > 0 ? trimmed : null;
-  }
-  if (typeof value === "number" || typeof value === "boolean")
-    return String(value);
-  return null;
-}
-
-function toNumberOrNull(value: unknown): number | null {
-  if (value === null || value === undefined) return null;
-  if (typeof value === "number") return Number.isFinite(value) ? value : null;
-  if (typeof value === "string") {
-    const trimmed = value.trim();
-    if (!trimmed) return null;
-    const parsed = Number(trimmed);
-    return Number.isFinite(parsed) ? parsed : null;
-  }
-  return null;
-}
-
 async function fetchPage(
   pageNo: number,
   session: UkVisaJobsAuthSession,