15. Decouple visualization configuration from inference call

[opeyemibami]

Description

Visualization currently requires passing multiple parameters at call time,
which can clutter usage and make reuse harder.

This issue proposes allowing visualization configuration to be set once
at pipeline level or via a small config object.

Scope

• Optional visualization configuration container
• Preserve existing pipeline.visualize(...) API
• No change to default behavior

Acceptance Criteria

• Visualization settings can be reused cleanly
• Existing usage remains valid
• Visualization output remains identical

Notes / Constraints

• Do not expand inference API surface
• Visualization remains optional

Testing Requirements

• Test that configured visualization matches explicit call behavior
• Test backward compatibility