Primary deterministic pack for the D-139 engagement evidence substrate. Installs four Layer-1 silent producer recipes (`engagement-velocity-producer` / `engagement-silence-producer` / `inbound-outbound-ratio-producer` / `last-meaningful-touch-producer`) wrapping the deterministic deal-level topics (`engagement_velocity_signal` + `engagement_silence_duration` + `inbound_outbound_ratio` + `last_meaningful_touch`) plus four Layer-2 visible alerts that surface decaying-velocity deals, silence-exceeded deals, out-of-band engagement (rep mail not landing in CRM), and overdue meeting follow-ups. Producers and alerts are vendor-agnostic — both subscribe to the cross-vendor deal/opportunity update bus and dispatch via the dynamic `{{context.event.payload.platform}}` scope that resolves to either `connection.api.hubspot.deal` or `connection.api.salesforce.opportunity` per event. The substrate-side housekeeping engagement-aggregates code (D-139 P3 + P4) is the canonical compute path; producer recipes here re-emit the row through the recipe-cycle audit so the user sees the topic ticking on each deal touch (Layer-1 pattern). Cost-preview previews zero token cost (deterministic only). Independent install gate from the post-substrate canary `crm-commitment-tracker` pack (P6.B) — installing the deterministic pack does NOT carry a body-content MCP grant.