fix: tests assertion ignore evaluationId

[zhukaihan]

Ignore evaluationId in metadata.

[Copilot]

Pull Request Overview

This PR fixes test assertion issues by ignoring the evaluationId field in metadata when comparing variants, as this field is inconsistent across evaluations. It introduces a custom assertion function to handle this comparison properly.

• Adds a custom assertVariantEquals function that normalizes evaluationId metadata before comparison
• Updates test variant and assertions to use the new comparison function
• Adds environment configuration files for staging and production

Reviewed Changes

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

File	Description
src/test/kotlin/RemoteEvaluationClientTest.kt	Implements custom variant comparison logic and updates test assertions
.env.staging	Adds staging environment configuration
.env.proooood	Adds production environment configuration

Comments suppressed due to low confidence (1)

src/test/kotlin/RemoteEvaluationClientTest.kt:1

• The logic for creating metadata is incorrect. When expected.metadata is null but actual?.metadata is not null, an empty mutable map is created, but it should preserve the actual's metadata structure. This could cause test failures when actual has metadata but expected doesn't.

package com.amplitude.experiment

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