meshStack Solution: Publisher ID Alignment for Content Hub Certification

What Changed

The meshStack solution package received a publisher ID update to align with Microsoft Partner Center configuration, addressing a best practice validation issue identified during the certification process.

Packaging Updates

• Publisher ID: Updated from meshcloudgmbh5353994 to meshcloudgmbh1628603483473 in solution metadata
• Version: Bumped from 3.0.0 to 3.0.1 to reflect the packaging change
• Release Notes: Added tracking file documenting the publisher ID correction

Per PR discussion: this change addresses certification report item 300.4.1.1 (Best Practice Tests), ensuring the solution metadata matches Partner Center configuration for proper Content Hub publication.

Affected Files

(packaging artefacts: 3.0.1.zip, ReleaseNotes.md, SolutionMetadata.json, Solution_meshStack.json)