Morning Brief Skill — v5.1.0

<quick_start> Trigger: scheduled Mon–Fri ~7:10 AM CST (after callable-lead-count-skill), or manual — "morning brief", "today's dial list", "SOD". Flow: run_context → GATES 0/A/B/C/D → Section 0 calendar → 1 portfolio → 2 momentum → 2.5 dial scorecard → 3 AE drift → 4 callable health → 5 priority dial list + drafts → 6 meeting prep → (7 recent calls, optional) → deliver (HTML, Gmail draft, Slack DM) → sidecar. Writes allowed: Gmail create_draft and Slack slack_send_message only. Everything else is read-only. </quick_start>