Verify each finding against the current code and only fix it if needed.

Inline comments:
In `@package.json`:
- Around line 34-36: The package version conflict is between "eslint" and the
two TypeScript ESLint packages; update package.json so the peer ranges align:
either downgrade "eslint" from "10.0.2" to a compatible ^9.x release, or upgrade
both "@typescript-eslint/eslint-plugin" and "@typescript-eslint/parser" to a
release that explicitly supports ESLint 10 (e.g., the `@typescript-eslint` major
that lists eslint ^10 in its peerDependencies); modify the version strings for
"eslint" and/or the two "@typescript-eslint/*" entries accordingly, run your
package manager (npm/yarn/pnpm install) and re-run the linter to confirm the
conflict is resolved.
- Around line 36-39: The package.json currently lists incompatible dependency
combinations: update the testing stack by aligning jest and ts-jest (either
upgrade "jest" to a 27.x release to match "ts-jest" 27.0.3 and also set
"@types/jest" to a matching 27.x, or instead downgrade "ts-jest" to a version
that supports jest 19); and fix ESLint peer issues by aligning ESLint and
`@typescript-eslint` (either downgrade "eslint" to a 9.x release compatible with
"@typescript-eslint/eslint-plugin" 8.x or upgrade
"@typescript-eslint/eslint-plugin" to a version that supports "eslint" 10);
adjust the package.json entries for "jest", "ts-jest", "eslint",
"@typescript-eslint/eslint-plugin", and "@types/jest" accordingly and run
npm/yarn install and tests to verify no remaining peer conflicts.