fix (ci_checker) : avoid conflicts when CI checker sessions run at the same time (#380)

Description

• split archives into different directories
• use a commit reference instead of a branch ref if possible
• fix DLE network detection (compatible with DLE 3.0+)

Related issue

#380 (closed)

Examples

Broken DB migration:

• https://console.postgres.ai/demo/observed-sessions/870
• https://github.com/postgres-ai/green-zone/actions/runs/2506774205

Fixed DB migration:

• https://console.postgres.ai/demo/observed-sessions/871
• https://github.com/postgres-ai/green-zone/actions/runs/2507073581

Checklist

• MR description has been reviewed
• MR changes are functionally tested
• MR does NOT have text changes OR there are text changes and they have been reviewed
• MR does NOT have API/CLI changes OR there are API/CLI changes and they have been reviewed
• MR does NOT have UI changes OR there are UI changes and they have been reviewed

Closes #380 (closed)