Preserve roles when converting messages to seed prompts

[biefan]

Summary

• preserve API-compatible message roles when converting Message objects to SeedPrompt records
• keep the existing simulated_assistant -> assistant normalization by relying on message.api_role
• add regression coverage for system, developer, tool, and simulated_assistant

Problem

SeedPrompt.from_messages() currently collapses every non-assistant message role to user. That loses supported roles such as system, developer, and tool when messages are converted into seed prompts.

Validation

• .venv/bin/pytest tests/unit/models/test_seed.py -q
• .venv/bin/ruff check pyrit/models/seeds/seed_prompt.py tests/unit/models/test_seed.py

[romanlutz]

This looks correct. I'm wondering why we had that here...

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Preserves API-compatible message roles during Message → SeedPrompt conversion, preventing loss of roles like system, developer, and tool.

Changes:

• Update SeedPrompt.from_messages() to use message.api_role directly instead of collapsing non-assistant roles to user.
• Add regression tests covering system, developer, tool, and simulated_assistant → assistant normalization.

Reviewed changes

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

File	Description
tests/unit/models/test_seed.py	Adds parametric regression test to ensure supported roles are preserved (and simulated_assistant normalizes to assistant).
pyrit/models/seeds/seed_prompt.py	Adjusts conversion logic to preserve message.api_role when creating SeedPrompt records.