Add non-blocking PACE links to simulation details

[tomvothecoder]

Description

Adds non-blocking PACE links to the simulation details page.

• Closes [Enhancement]: Add PACE links to simulation details page #173
• Adds GET /api/v1/pace/resolve?execution_id=... to resolve a PACE experiment ID with a 5.0s timeout
• Keeps the main simulation details API unchanged and independent from PACE
• Shows Search in PACE immediately when executionId exists, then upgrades to Open in PACE if resolution succeeds
• Shows lightweight in-progress and fallback tooltip states in the Performance section

Checklist

• Code follows project style guidelines
• Self-reviewed code
• No new warnings
• Tests added or updated (if needed)
• All tests pass (locally and CI/CD)
• Documentation/comments updated (if needed)
• Breaking change noted (if applicable)

Deployment Notes (if any)

[Copilot]

Pull request overview

Adds the non-blocking PACE-link flow requested in #173 by resolving a PACE experiment ID separately from the main simulation-details fetch, so the details page can render without waiting on PACE.

Changes:

• Adds a new backend GET /api/v1/pace/resolve endpoint to look up a PACE experiment ID from a simulation execution ID.
• Updates the simulation details page to request PACE resolution asynchronously and build either a direct experiment link or a fallback search link.
• Adds UI states in the Performance section for in-progress and fallback PACE-link behavior, plus backend tests for the new resolver.

Reviewed changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
frontend/src/features/simulations/SimulationDetailsPage.tsx	Triggers async PACE resolution and passes link/status props into the details view.
frontend/src/features/simulations/components/SimulationDetailsView.tsx	Renders the new PACE link, spinner, and tooltip states in the Performance section.
frontend/src/features/simulations/api/api.ts	Adds the frontend API client/types for /pace/resolve.
backend/tests/features/pace/test_api.py	Adds backend tests for the resolver’s success, validation, and fallback paths.
backend/app/main.py	Registers the new PACE router in the FastAPI app.
backend/app/features/pace/api.py	Implements the PACE resolution endpoint and upstream lookup/parsing logic.
backend/app/features/pace/__init__.py	Adds the new backend feature package.