refactor: remove unused WPVDB\WPVDB bootstrap class

[rbcorrales]

Summary

Removes includes/class-wpvdb.php, which defined the WPVDB\WPVDB class.

Background

It's dead code. The active bootstrap in wpvdb.php uses \WPVDB\Plugin::get_instance(), and Plugin already registers the hooks this class duplicated (rest_api_init, wpvdb_process_embedding, wpvdb_process_embedding_batch, wpvdb_run_queue_now). Verified before removal:

• No references to \WPVDB\WPVDB anywhere in the codebase (excluding vendor).
• The file is never required/included.
• It can't autoload: PSR-4 maps WPVDB\ to includes/, so WPVDB\WPVDB would resolve to includes/WPVDB.php, not the WordPress-named includes/class-wpvdb.php.

So nothing loads or calls it; removing it has no runtime effect.

Testing

Deletion-only change. No behavior to exercise; CI lint/test cover the rest.

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Deletes the unused includes/class-wpvdb.php file containing the dead WPVDB\WPVDB bootstrap class. The active bootstrap path uses \WPVDB\Plugin::get_instance() which already registers the same hooks, and the removed file is never required or autoloaded (PSR-4 mapping would not resolve to this WordPress-style filename).

Changes:

• Remove includes/class-wpvdb.php entirely.

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