[FSSDK-11455] Java - Add SDK Multi-Region Support for Data Hosting

[esrakartalOpt]

Summary

• Add Multi-Region Support for Data Hosting

Test plan

• Created and added new test cases

Issues

• FSSDK-11455

[Copilot]

Pull Request Overview

This PR adds multi-region support for data hosting in the Optimizely Java SDK by introducing region-specific event endpoints. The implementation allows the SDK to route events to appropriate regional endpoints (US or EU) based on the project configuration.

Key changes:

• Added a Region enum to ProjectConfig with US and EU values
• Created EventEndpoints utility class to map regions to specific event endpoint URLs
• Updated all parsers and constructors to handle the new region field from datafiles

Reviewed Changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
core-api/src/main/java/com/optimizely/ab/config/ProjectConfig.java	Added Region enum with US and EU values and getRegion() method
core-api/src/main/java/com/optimizely/ab/config/DatafileProjectConfig.java	Added region field and updated constructors to support region parameter
core-api/src/main/java/com/optimizely/ab/event/internal/EventEndpoints.java	New utility class providing region-specific endpoint mapping
core-api/src/main/java/com/optimizely/ab/event/internal/EventFactory.java	Updated to use region-specific endpoints instead of hardcoded URL
core-api/src/main/java/com/optimizely/ab/config/parser/*.java	Updated all parsers to extract region from datafile with US as default
core-api/src/test/java/**/*.java	Updated test files to accommodate new region parameter and validate endpoint behavior

[jaeopt]

Same here. string-type region will make it much easier and safer when we add more countries in the server.

[jaeopt]

A few changes suggested

[jaeopt]

LGTM