Fix PDF delivery test timeout

[hrtechifyed]

Root cause

The browser delivery test uses a lightweight FakeJsPDF adapter that implements addPage() and getNumberOfPages() but not deletePage(). The acceptance report assembler trims old pages in a loop before rebuilding. Because the proxy returned a no-op function for the missing method, the page count never decreased and report generation remained stuck on “Building your advisory document”.

Fix

• add a guarded deletePage() fallback only when neither the real jsPDF API nor its prototype provides one
• decrement the lightweight adapter's numeric page counter so the final assembler can make progress
• leave real jsPDF untouched

Validation

The Executive Assessment Tests workflow must pass before merge.