v0.4.5

First public npm release of pi-compaction-control.

• Granular per-model contextCap on contextWindow
• Configurable compactionModel (provider/modelId + thinkingLevel)
• /compaction-model runtime override and /compaction-control-doctor
• Published to npm via GitHub Actions Trusted Publishing (OIDC + provenance)

Install: pi install npm:pi-compaction-control