Fix/notes deletion

[TDannhauer]

Summary

This updates the ActiveSync Notes delete path to work correctly with non-multiplexed Notes collections.

• Pass the active Notes folder/notepad id through notes_delete() so Mnemo can delete within the correct separate collection.
• Process Notes deletes per UID so one stale or already-missing item from the client does not prevent later deletes in the same SYNC request.
• Fix Notes delete recovery to query notes_getActionTimestamp() instead of the unrelated Tasks timestamp lookup.

Test Plan

• Verified PHP syntax for vendor/horde/core/lib/Horde/Core/ActiveSync/Driver.php.
• Verified PHP syntax for vendor/horde/core/lib/Horde/Core/ActiveSync/Connector.php.
• Ran ActiveSync device tests:
  vendor/bin/phpunit --bootstrap vendor/autoload.php vendor/horde/activesync/test/Horde/ActiveSync/DeviceTest.php
• Ran core ActiveSync tests with required package mocks loaded:
  OK (8 tests, 32 assertions)