Add link preview

[kristina-fefelova]

No description provided.

[Copilot]

Pull Request Overview

This PR introduces support for link previews by adding new event types, validation schemas, database adapter methods, and corresponding migration scripts.

• Added CreateLinkPreview and RemoveLinkPreview events and schemas.
• Extended the database and SDK types to handle link preview data.
• Updated query utilities and messaging logic to incorporate link preview information.

Reviewed Changes

Copilot reviewed 27 out of 27 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/server/src/notification/notification.ts	Updates the notifyReaction usage to align with the new event structure.
packages/server/src/middleware/validate.ts	Adds new validations for CreateLinkPreview and RemoveLinkPreview events.
packages/server/src/middleware/db.ts	Implements database methods for creating and removing link previews along with related changes.
packages/sdk-types/src/requestEvents/message.ts & responseEvents/message.ts	Introduces new event interfaces and updates to support link preview data.
packages/cockroach/src/*	Adds migration scripts, schema changes, and adapter updates to support link previews.
packages/query/*	Updates queries and mapping functions to include link preview information.
packages/rest-client/*	Integrates link preview changes into REST client functions.

Comments suppressed due to low confidence (2)

packages/server/src/middleware/validate.ts:164

• Please ensure that unit tests are added to cover the new CreateLinkPreview and RemoveLinkPreview events to validate their behavior and schema compliance.

case MessageRequestEventType.CreateLinkPreview:

packages/server/src/notification/notification.ts:52

• Ensure that using 'event.message' instead of 'event.reaction.message' in the notifyReaction call is intentional and consistent with the expected API behavior.

return await notifyReaction(ctx, event.card, event.message, event.messageCreated, event.reaction)