Send Victor cost-methodology DM (openrouter cacheWrite=0 + 6/4 retraction) — verbatim body, evaluate_after 13:00 UTC

Send a single Slack DM to Victor (U05A72893B2) with the verbatim body in `metadata.dm_body`. Execute as ONE tool call: `message action:send target:user:U05A72893B2 message:<copy verbatim from metadata.dm_body>` Then PATCH this task to status=completed with result=<the Slack ts of the sent message>. DO NOT compose new content. The body is final. The lease budget is one curl call. EVALUATE_AFTER: 2026-06-13T13:00:00Z — heartbeat must NO_OP and let the task re-queue until then. With max_retries=5 and ~8h queue-ahead at ~6min cadence, this is within the survival window per LEARNINGS.md 2026-06-12 queue-ahead math. Context: this replaces blocked-flip task 42a25997 which silently failed (LEARNINGS.md 2026-06-13). Previous attempt 6/11 task b8f69a66 poison-pilled.