Modula integration with stock_vlm_mgmt

This module extends the stock location configuration to let you mark a location as a Modula vertical lift module (VLM). It adds a new vendor option called "Modula" to the vendor selection field on stock locations, alongside any other VLM vendors already available.

Behind the scenes, it provides the technical connector that allows Odoo to communicate with the Modula Driver web service. This connector sends storage and retrieval tasks to the Modula machine, checks whether the operator has completed them, and confirms completion back to the machine. It handles operations such as putting items away and picking them, and reports the quantity actually handled.

There are no new menus, buttons, or reports added by this module. The change is visible when configuring a stock location: you can choose Modula as the VLM vendor. The module depends on the base VLM management module, which provides the overall VLM workflow and screens.

Business rules and automatic behaviours are limited to the vendor selection and the connector logic. The connector includes error handling for connection issues and timeouts, and it polls the Modula agent until a task is done. It does not add any scheduled jobs, emails, or default values on its own.