Implement sessionStorage-based queue persistence for traditional web pages in Analytics SDK

[oidacra]

Task

Implement queue persistence mechanism for the Analytics SDK to work correctly on traditional web pages (server-side rendered pages from dotCMS). Currently, when navigating between traditional pages, the in-memory queue is lost because page reloads clear the memory state.

Technical Approach

• Integrate sessionStorage with the existing queue implementation
• Configure optimized default queue items and wait times for traditional page scenarios
• Ensure seamless operation across page navigations in server-rendered contexts

Acceptance Criteria

• Analytics queue persists across traditional page navigations using sessionStorage
• Default queue items configuration is optimized for traditional pages
• Wait time configuration is optimized for traditional page performance
• Queue data is properly synchronized between memory and sessionStorage
• Existing SPA functionality remains unaffected
• Documentation updated with traditional page configuration examples

Proposed Objective

Same as Parent Issue

Proposed Priority

Same as Parent Issue

Assumptions & Initiation Needs

• Analytics SDK library already has queue implementation for SPAs
• sessionStorage API is available in target browsers
• Queue serialization/deserialization logic needs to be implemented

[github-actions]

PRs linked to this issue

• feat(analytics): Implement analytics event persistence to sessionStor… by @oidacra

PRs linked to this issue

• feat(analytics): Implement analytics event persistence to sessionStor… by @oidacra
• fix(analytics): update storage handling during keepalive flush to prevent duplicate event sends by @oidacra