JWT user identifiers additional fields dot notation in CI

[ori-gold-px]

update ci_config to include additional field names with dot notation to show how to update enforcer CI configurations for new test version

Related to: https://perimeterx.atlassian.net/browse/ENT-20788

• Updates ci config
• Updates e2e test version

[Copilot]

Pull Request Overview

This PR updates the enforcer configuration to support JWT user identifiers with dot notation field names and bumps the E2E test version to 1.23.4. The changes enable testing of nested JWT field extraction (e.g., "profile.id", "session.id") for both cookie and header-based authentication.

• Adds dot notation field names ("profile.id", "session.id") to JWT cookie and header additional fields
• Compacts multi-line arrays to single-line format for brevity
• Updates E2E test image version from 1.23.3 to 1.23.4

Reviewed Changes

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

File	Description
ci_files/enforcer-config.json	Adds dot notation field names to JWT additional fields arrays and reformats arrays to single lines
.github/workflows/ci_e2e.yaml	Bumps ENFORCER_SPEC_TESTS_IMAGE_TAG from 1.23.3 to 1.23.4

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