[AI-FSSDK] [FSSDK-12958] Continue rule evaluation after local holdout hit - #640

Summary

A local holdout hit used to return the holdout variation and stop evaluating the flag. Now it excludes the user from that rule only: the hit is recorded, the rule is skipped, and evaluation continues with the next experiment or delivery rule, so the user can still be served by a later rule.

Changes

• Local holdout hits on experiment and delivery rules skip that rule and continue to the next rule, with no jump to "Everyone Else"
• Each local holdout hit sends one holdout impression in the existing format, regardless of sendFlagDecisions; DISABLE_DECISION_EVENT suppresses them
• Holdout hits are recorded in a new list on the feature decision; the existing holdout field is kept (deprecated) and holds the first hit, so the public API is unchanged
• The final decision and its events are unchanged; global holdouts are unchanged

Jira Ticket

FSSDK-12958