feat: added model settings

[jcabrero]

This PR adds model settings to enable using the model settings to define for how long a model waits and how many retries it does.

Also, if num_retries == - 1 then the number of retries is infinite

[Copilot]

Pull Request Overview

This PR introduces configurable model settings for retry behavior and timeout handling. The changes enable configuring how many retries a model performs and how long it waits between retries, with support for infinite retries when num_retries is set to -1.

• Added ModelSettings class with configurable retry count and timeout parameters
• Updated model metadata fetching to use centralized settings instead of hardcoded values
• Exported new settings through the common package interface

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
packages/nilai-common/src/nilai_common/config.py	Defines ModelSettings class and creates MODEL_SETTINGS instance with environment variable support
packages/nilai-common/src/nilai_common/init.py	Exports MODEL_SETTINGS to make it available for other packages
nilai-models/src/nilai_models/daemon.py	Updates get_metadata function to use configurable settings instead of hardcoded retry and timeout values

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