v1.2.1

Minor Compatibility and Stability Release

This release carries compatibility-facing behavior changes and operational hardening. Read the summary below before upgrading or publishing.

• Added codex auth forecast --explain support and related regression coverage.
• Aligned GPT-5 model routing with current OpenAI defaults.
• Added package subpath exports and tightened shipped config/public API coverage.
• Added maintainer runbooks and refreshed onboarding and command guidance.

Commit Summary

• 7065009 test: cover runtime benchmark script
• 26cdb9e Use retry-safe cleanup in wrapper smoke test
• 7d44c75 Use retry-safe benchmark cleanup
• 75a6a6b Exercise target loader retry wiring
• c328fc7 Exercise sync target retry wiring
• 3e44d11 Preserve experimental settings entry types
• 3be4df4 Tighten named backups entry coverage
• 6de0144 Fail fast on benchmark test hangs
• 9e13a24 align gpt-5 model routing with current OpenAI defaults
• 173d64f add responses continuation request contract support
• 9968ba8 enhance responses parser for semantic SSE events
• 71d44c7 add response compaction fallback for fast sessions