Fix CI: Integration Tests venv conflict on ubuntu-24.04

[Copilot]

🔧 Maintenance

Description

Integration Tests workflow failed on ubuntu-24.04 because the GHA workflow pre-creates .venv via uv sync --extra dev, then test-integration.sh attempted to create it again with uv venv, causing a collision.

Fix: Check if .venv exists before creating it—reuse if present (CI), create if absent (local).

# scripts/test-integration.sh
if [[ -d ".venv" ]]; then
    source .venv/bin/activate
else
    uv venv --python 3.12 || uv venv
    source .venv/bin/activate
    uv pip install -e ".[dev]"
fi

Type

• CI/CD improvements

Testing

• Changes tested locally
• All existing tests pass
• No functional changes to user-facing features

Checklist

• LABEL: Consider applying ignore-for-release if not user-facing
• Code follows project style guidelines
• No breaking changes introduced

Original prompt

Fix the failing GitHub Actions workflow Integration Tests (ubuntu-24.04, x86_64, linux, apm-linux-x86_64)
Analyze the workflow logs, identify the root cause of the failure, and implement a fix.
Job ID: 62688877859
Job URL: https://github.com/danielmeppiel/apm/actions/runs/21731816516/job/62688877859

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