PR Checklist

Closes N/A

What is the new behavior?

• Removes the direct lodash-es dependency from @limitless-angular/sanity.
• Replaces preview-kit lodash-es/isEqual deep imports with the existing dequal dependency, so the published FESM no longer ships the extensionless lodash-es/isEqual import that fails in some Vitest/Node-side consumer setups.
• Replaces portable text lodash memoize usage with a small local memoize helper that preserves the one-argument reference-cache behavior used by the services.
• Adds regression tests for memoization behavior and live query source-map deep equality.
• Updates Angular compatibility packaging so it no longer carries @types/lodash-es.

Does this PR introduce a breaking change?

• Yes
• No

Other information

This fixes a consumer-side Vitest/Node ESM resolution issue caused by the previous extensionless lodash-es/isEqual import in @limitless-angular/sanity/preview-kit.

Testing:

• pnpm --filter @limitless-angular/sanity test -- portabletext/src/utils/memoize.spec.ts preview-kit/src/live-query-provider/live-queries.service.spec.ts
• pnpm --filter @limitless-angular/sanity build
• pnpm --filter @limitless-angular/sanity lint

[Optional] What gif best describes this PR or how it makes you feel?

N/A