fusion/.changeset/fn-4400-trim-executor-exec-prompt.md

@runfusion/fusion

@runfusion/fusion
minor

Trim heartbeat execution prompt sections by template-aware caps, add per-project and per-agent heartbeatPromptTemplate controls, emit prompt-size heartbeat audit logs, and expose per-agent prompt-size history via /api/agents/:id/prompt-sizes with dashboard sparkline visualization.