refactor(ui): use paginated author query for metadata autocomplete

[alexhb1]

Description

Swaps the p-autocomplete components used for author input to use the author query service and paginated / lazy loaded results.

Linked Issue

N/A

Changes

• author-autocomplete.service.ts handling the basic pagination/loading in the shape that the p-autocomplete component needs
• Wired up to the metadata editor, physical book dialog, metadata picker, and bulk editor dialog, replacing the client side computed list.

Manual Testing Steps

Use components, confirm results are complete, lazy loaded, and choosing an author correctly fills and matches with the rest of the FE browsing UI.

Screenshots (Optional)

N/A

Additional Context (Optional)

This is for the optimus p-autocomplete and current UI. Not supported with the native app-autocomplete until metadata page reworks can take place.

AI Disclosure

N/A

Checklist

• This PR links and implements an accepted issue.
• This PR is a single focused change.
• There are new or updated tests validating this change.
• I ran just ui check and just api check.
• I have added screenshots if there were any UI changes.
• I have disclosed any AI usage as per the organization AI Policy above.
• I understand all of my submitted changes.

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[alexhb1]

Sonar doesn't like the duplicated HTML for each p-autocomplete, but extracting that would be weird, so i think it's fine.