v0.5.6

feat: add execute-goal command for running goals in forge loops

Adds a new execute-goal tool that creates an isolated Forge worktree and warps the current session into it with an active watchdog. The goal is implemented directly without a plan/approval phase, and the loop drives automated audits until all findings are resolved.

refactor: extract sendPromptWithRetryRecovery to deduplicate retry patterns in runtime

Consolidates 6+ instances of inline retry-with-fallback patterns into a shared sendPromptWithRetryRecovery and buildPromptRetryFn. Net -75 lines.