llmci 0.4.0

Cross-provider migration, few-shot strategy, and PII allow-list for safety gates.

Added

• Cross-provider migration — llmci migrate accepts provider/model refs with per-side base URLs
• Few-shot migration strategy — --strategy few_shot inlines train examples as demos
• PII allow-list — pii_leakage criteria accept allow_list (literal or regex: entries)

See CHANGELOG for full details.