✨ Label tests with unique IDs and propagate testuid

[bzorn]

Added unique testuid to each test and test result; updated logic to use it.

[pelikhan]

@copilot use nanoid package for test generation

[Copilot]

Pull Request Overview

This PR adds a new testuid field to tests and results, propagates it through test execution and evaluation, and updates related scripts and environment configuration.

• Introduce testuid property in type definitions and propagate through runTest and evaluation logic
• Assign unique IDs to tests in promptpexGenerate
• Update package.json scripts and add .env.ollama for environment settings

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/genaisrc/src/types.mts	Added optional testuid field to PromptPexTest and PromptPexTestResult
src/genaisrc/src/testrun.mts	Passed testuid into the payload for runTest
src/genaisrc/src/testevalmetric.mts	Lookup tests by testuid and error if not found
src/genaisrc/src/promptpex.mts	Loop to assign testuid labels when missing
package.json	Added new script variants with --env .env.ollama
.env.ollama	New environment file for Ollama model credentials

Comments suppressed due to low confidence (2)

src/genaisrc/src/types.mts:352

• [nitpick] Consider renaming testuid to testUid (or testID) to follow camelCase conventions for improved readability.

    testuid?: string

src/genaisrc/src/promptpex.mts:193

• There are no unit tests verifying that testuid is assigned and propagated correctly. Add tests around promptpexGenerate to cover this new logic.

            if (!test.testuid) {